学生成绩管理系统c
① 学生成绩管理系统 C语言
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct stud
{
long num;
char name[20];
double score;
};
typedef struct stucode
{
struct stud student ;
struct stucode *next;
}L;
void menu();
void createlist(struct stucode **r);
void out(struct stucode *r);
void search1(struct stucode *r);
void search2(struct stucode *r);
void del(struct stucode **r);
void insert(struct stucode **r);
void sort(struct stucode **r);
void main()
{
char choose;
int flag=1;
struct stucode *r=NULL;
while(flag)
{
system("cls");
menu();
choose=getchar();
switch(choose)
{
case '1':
createlist(&r);
out(r);
printf("Testing function 1\nPress any key to continue\n");
getchar();
getchar();
break;
case '2':
search1(r);
printf("Testing function 1\nPress any key to continue\n");
getchar();
getchar();
break;
case '3':
search2(r);
printf("Testing function 1\nPress any key to continue\n");
getchar();
getchar();
break;
case '4':
del(&r);
out(r);
printf("Testing function 1\nPress any key to continue\n");
getchar();
getchar();
break;
case '5':
insert(&r);
out(r);
printf("Testing function 1\nPress any key to continue\n");
getchar();
getchar();
break;
case '6':
sort(&r);
out(r);
printf("Testing function 1\nPress any key to continue\n");
getchar();
getchar();
break;
case '7':
out(r);
printf("Testing function 7\nPress any key to continue\n");
getchar();
getchar();
break;
case '0':
flag=0;
printf("The end.\n");
break;
default: printf("\nWrong Selection!(选择错误,请重选!)\n");getchar();getchar();
}
}
}
void createlist(struct stucode **r)
{
struct stucode *p,*t;
long n;
char a[20];
double s;
if(*r) *r=NULL;
printf(" \n请输入：\n 学号（请按学号升序排列） 姓名 分数 （若要结束请输入三个为零）
\n");
scanf("%ld%s%lf",&n,a,&s);
if(n==0) return;
p=(L *)malloc(sizeof(L));
p->student.num=n;
strcpy(p->student.name,a);
p->student.score=s;
p->next=NULL;
*r=p;
scanf("%ld%s%lf",&n,a,&s);
while(n)
{
t=p;
p=(L *)malloc(sizeof(L));
p->student.num=n;
strcpy(p->student.name,a);
p->student.score=s;
p->next=NULL;
t->next=p;
scanf("%ld%s%lf",&n,a,&s);
}
}
void search1(struct stucode *r)
{
long x;
if(!r)
{
printf("没有学生信息可查询!\n");
return ;
}
printf(" 请输入要查询的学生信息的学生学号:\n");
scanf("%ld",&x);
while(r&&r->student.num!=x)
r=r->next;
if(r==NULL)
printf("Error! No such student !\n");
else
printf("%ld %s %.2lf\n",r->student.num,r->student.name,r->student.score);
}
void search2(struct stucode *r)
{
char m[20];
if(!r)
{
printf("没有学生信息可查询!\n");
return ;
}
printf(" 请输入要查询的学生信息的学生姓名:\n");
scanf("%s",m);
while(r&&strcmp(r->student.name,m))
r=r->next;
if(r==NULL)
printf("Error! No such student !\n");
else
printf("%ld %s %.2lf\n",r->student.num,r->student.name,r->student.score);
}
void del(struct stucode **r)
{
long k;
struct stucode *p=*r,*t;
if(!(*r))
{
printf("没有学生信息可删除 !\n");
return ;
}
printf(" 请输入要删除的学生信息的学生学号:\n");
scanf("%ld",&k);
if(p->student.num==k)
*r=(*r)->next,free(p);
else
{
while(p->next&&p->next->student.num!=k)
p=p->next;
if(p->next==NULL)
printf("Error! No such student !\n");
else
{
t=p->next;
p->next=p->next->next;
free(t);
}
}
}
void insert(struct stucode **r)
{
long n;
char a[20];
double s;
L *p,*t,*k;
printf(" 请输入要插入的学生信息的学生学号 姓名 分数:\n");
scanf("%ld%s%lf",&n,a,&s);
p=(L *)malloc(sizeof(L));
p->student.num=n;
p->student.score=s;
strcpy(p->student.name,a);
if(!(*r))
{
*r=p;
(*r)->next=NULL;
return ;
}
if(p->student.num<(*r)->student.num)
p->next=(*r),(*r)=p;
else
{
t=*r;
k=t;
while(t->next&&t->next->student.num<=p->student.num)
t=t->next;
p->next=t->next;
t->next=p;
*r=k;
}
}
void sort(struct stucode **r)
{
struct stucode *t,*p,*q,*z;
if(!r)
{
printf("没有学生信息可排序!\n");
return ;
}
if(!(*r)||!(*r)->next)
return;
t=*r;
p=t->next;
t->next=NULL;
while(p)
{
q=p->next;
if(p->student.score>t->student.score)
{
p->next=t;
t=p;
}
else
{
z=t;
while(z->next&&z->next->student.score>=p->student.score)
z=z->next;
p->next=z->next;
z->next=p;
}
p=q;
}
*r=t;
}
void out(struct stucode *r)
{
printf("\n\n");
if(!r)
{
printf("没有学生信息可输出!\n");
return ;
}
while(r)
{
printf("%ld %s %.2lf\n",r->student.num,r->student.name,r->student.score);
r=r->next;
}
printf("\n\n");
}
void menu()
{
printf("\n 学生信息管理系统\n");
printf("\n 菜单\n\n");
printf("\n 1建立链表并显示\n");
printf("\n 2查找某学号的学生信息\n");
printf("\n 3查找某姓名的学生信息\n");
printf("\n 4删除某学号的学生信息\n");
printf("\n 5插入新的学生信息\n");
printf("\n 6按分数降序排列输出\n");
printf("\n 7输出\n");
printf("\n 0退出\n");
printf("\n 请选择您要执行的选项:\n");
}
② 学生成绩管理系统c语言
用C语言程序编写一个学生成绩管理系统，界面用菜单进行设计。菜单功能可用函数实现。
# include <iostream>
# include <fstream>
# include <string.h>
#include <conio.h>//用getch();
using namespace std;
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌Student类﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
class Student
{
public:
char name[20];
char Id[20];
int Cnum; //C++课程得分
int Mnum; //汇编课程得分
int Enum; //嵌入式操作系统课程得分
int sum; //总分
Student * Next;
void Input()
{
cout<<"\t\t请输入学生的姓名："; cin>>name;
cout<<"\t\t请输入学生的学号："; cin>>Id;
cout<<"\t\t请输入C++课程的成绩："; cin>>Cnum;
cout<<"\t\t请输入汇编课程的成绩："; cin>>Mnum;
cout<<"\t\t请输入嵌入式操作系统课程的成绩："; cin>>Enum;
sum=Cnum+Mnum+Enum;
}
void ReadFile(istream & in)
{
in>>name>>Id>>Cnum>>Mnum>>Enum>>sum;
}
void Show()
{
cout<<"姓名:"<<name<<endl<<"学号:"<<Id<<endl<<"C++:"<<Cnum<<endl
<<"汇编:"<<Mnum<<endl<<"嵌入式操作系统："<<Enum<<endl<<"总成绩:"<<sum<<endl<<endl<<endl;
}
};
//﹌﹌﹌﹌﹌﹌﹌﹌﹌Studentmassage类﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
class Studentmassage
{
public:
Studentmassage();
~Studentmassage();
void ShowMenu();
void Find();
void Save();
void ModifyItem();
void RemoveItem();
void Swap(Student *,Student *);
void Sort();
//void Unpass();
int ListCount();
//void Average();
void Display()
{
for(Student * p=Head->Next;p!=End;p=p->Next)
p->Show();
cout<<"输入任意字符！继续……";
getch();
}
void AddItem()
{
End->Input();
End->Next=new Student;
End=End->Next;
cout<<"添加成功!"<<endl;
cout<<"输入任意字符！继续……";
getch();
}
private:
Student * Head,* End;
ifstream in;
ofstream out;
Student *FindItem(char * name)
{
for(Student * p=Head;p->Next!=End;p=p->Next)//匹配成功则返回上一个指针，不成功就返回空
if(!strcmp(p->Next->name,name))return p;
return NULL;
}
Student *FindID(char * Id)
{
for(Student * p=Head;p->Next!=End;p=p->Next)//匹配成功则返回上一个指针，不成功就返回空
if(!strcmp(p->Next->Id,Id))return p;
return NULL;
}
};
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌构造函数﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
Studentmassage::Studentmassage()
{
Head=new Student;
Head->Next=new Student;
End=Head->Next;
in.open("sort.txt");
if(!in)
cout<<"这是一个新系统，无学生信息。请先输入。"<<endl;
else
{
while(!in.eof())
{
End->ReadFile(in);
if(End->name[0]=='\0')break;
End->Next=new Student;
End=End->Next;
}
in.close();
cout<<"\t\t读取学生信息成功!"<<endl;
}
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌析构函数﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
Studentmassage::~Studentmassage()
{
Save();
for(Student * temp;Head->Next!=End;)
{
temp=Head->Next;
Head->Next=Head->Next->Next;
delete temp;
}
delete Head,End;
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌菜单﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::ShowMenu()
{
cout<<"********************************************************************************"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓〓 ☆ 学 生 成 绩 管 理 系 统 ☆ 〓〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓★★★★★ ★★★★★★★ ★★★★★〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 1.增加学生成绩 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 2.显示学生成绩 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 3.排序统计成绩 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 4.查找学生成绩 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 5.删除学生成绩 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 6.修改学生信息 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 0.安全退出系统 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"\n\t\t\n\t\t请选择：";
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌查找函数﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::Find()
{
char name[20] ,Id[10];
int x;
Student * p=NULL;
cout<<"\n\t\t*********************************\n";
cout<<"\t\t※ 1.按学生的姓名查找\n\t\t※ 2.按学生学号查找";
cout<<"\n\t\t*********************************\n请选择：";
cin>>x;
switch(x)
{
case 1:{cout<<"\t\t请输入要查找的学生的姓名：";cin>>name;
if(p=FindItem(name))
{
p->Next->Show();
cout<<"输入任意字符！继续……";
getch();
}
else
{
cout<<"\t\t没有找到该姓名的学生！"<<'\n'<<endl;
cout<<"输入任意字符！继续……";
getch();
}
}break;
case 2:
{
cout<<"\t\t请输入要查找的学生的学号：";cin>>Id;
if(p=FindID(Id))
{
p->Next->Show();
cout<<"输入任意字符！继续……";
getch();
}
else
{
cout<<"\t\t没有找到该学好的学生！"<<'\n'<<endl;
cout<<"输入任意字符！继续……";
getch();
}
}break;
}
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌修改信息﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::ModifyItem() //修改信息
{
char name[20];
Student * p=NULL;
cout<<"\t\t请输入要修改的人的姓名:";cin>>name;
if(p=FindItem(name))
{
cout<<"\t\t已找到学生的信息，请输入新的信息!"<<endl;
p->Next->Input();
cout<<"修改成功！"<<endl;
cout<<"输入任意字符！继续……";
getch();
}
else
{
cout<<"\t\t没有找到!"<<endl;
cout<<"输入任意字符！继续……";
getch();
}
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌删除信息﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::RemoveItem() // 删除信息
{
char name[20];
Student * p=NULL,*temp=NULL;
cout<<"\t\t请输入要删除的学生的姓名:"<<endl;cin>>name;
if(p=FindItem(name))
{
temp=p->Next;
p->Next=p->Next->Next;
delete temp;
cout<<"\t\t删除成功!"<<endl;
cout<<"输入任意字符！继续……";
getch();
}
else
{
cout<<"\t\t没有找到!"<<endl;
cout<<"输入任意字符！继续……";
getch();
}
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::Swap(Student *p1, Student *p2)//交换两个combox变量的数据域
{
Student *temp=new Student;
strcpy(temp->name,p1->name);
strcpy(temp->Id,p1->Id);
temp->Cnum=p1->Cnum;
temp->Mnum=p1->Mnum;
temp->Enum=p1->Enum;
temp->sum=p1->sum;
strcpy(p1->name,p2->name);
strcpy(p1->Id,p2->Id);
p1->Cnum=p2->Cnum;
p1->Mnum=p2->Mnum;
p1->Enum=p2->Enum;
p1->sum=p2->sum;
strcpy(p2->name,temp->name);
strcpy(p2->Id,temp->Id);
p2->Cnum=temp->Cnum;
p2->Mnum=temp->Mnum;
p2->Enum=temp->Enum;
p2->sum=temp->sum;
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
int Studentmassage::ListCount()//统计当前链表的记录总数，返回一个整数
{
if(! Head)
return 0;
int n=0;
for(Student * p=Head->Next;p!=End;p=p->Next)
{
n++;
}
return n;
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::Sort()//对当前链表进行排序
{
cout <<"Sorting..."<<endl;
Student *p=NULL,*p1=NULL,*k=NULL;
int n=Studentmassage::ListCount();
if(n<2)
return;
for(p=Head->Next;p!=End;p=p->Next)
for(k=p->Next;k!=End;k=k->Next)
{
if(p->sum>k->sum)
{
Studentmassage::Swap(p,k);
}
}
cout <<"排序完成！"<<endl;
getch();
return;
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌保存函数﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::Save()
{
out.open("sort.txt");
for(Student *p=Head->Next;p!=End;p=p->Next)
out<<p->name<<"\t"<<p->Id<<"\t"<<p->Cnum<<"\t"
<<p->Mnum<<"\t"<<p->Enum<<"\t"<<p->sum<<'\n';
out.close();
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌主函数﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
int main()
{
int x,i=0;
bool quit=false;
cout<<"\t\t§§§§§§§§§§§§§§§§§§§§§§§§§§"<<endl;
for(i=0;i<3;i++)
cout<<"\t\t◎\t\t\t\t\t\t ◎"<<endl;
cout<<"\t\t◎★★★★【 欢迎进入学生成绩管理系统 】★★★★◎"<<endl;
for(i=0;i<3;i++)
cout<<"\t\t◎\t\t\t\t\t\t ◎"<<endl;
cout<<"\t\t§§§§§§§§§§§§§§§§§§§§§§§§§§\n"<<endl;;
Studentmassage Grade;
cout<<"按任意键开始……";
getch();
while(!quit)
{
system("cls");
Grade.ShowMenu();
cin>>x;
switch(x)
{
case 0:quit=true;break;
case 1:Grade.AddItem();break;
case 2:Grade.Display();break;
case 3:Grade.Sort();break;
case 4:Grade.Find();break;
case 5:Grade.RemoveItem();break;
case 6:Grade.ModifyItem();break;
}
}
return 0;
}
③ c语言学生成绩管理系统c
以前帮别人写的 你可以看看 呵呵 不是很符合条件
********************************学生管理系统****************************/
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
typedef struct stu1
{
int num;
char name[20];
char sex[5];
char age[3];
char phone[20];
}stu1;
typedef struct stu2
{
//char num[20];
//char name[20];
int proj1;
int proj2;
int proj3;
int proj4;
int proj5;
int proj6;
}stu2;
void welcome();
int check_key(char key[]);
int m_can_do();
int m_class_can_do();
void manage_class();
void add_class();
void del_class();
void change_proj();
int m_stu_can_do();
void manage_stu();
void log_stu();
void change_stu();
void read_stu1(char clas[], stu1 stu[]);
int find_stu(stu1 stu[], int num);
void del_stu();
void read_stu2(char clas1[], stu2 stud[]);
void log_score();
void change_score();
void del_clas_stu();
int m_find_can_do();
void find();
void find_clas_basic();
void find_clas_score();
void find_stu_basic();
void find_stu_all();
//void chane_stu();
int main(){
int does;
char key[20];
int result;
welcome();
printf("请输入密码：");
scanf("%s", key);
printf("\n\n");
result = check_key(key);
while(result)
{
printf("您输入的密码有误，请重新输入：");
scanf("%s", key);
result = check_key(key);
printf("\n\n");
}
does = m_can_do();
while(true)
{
if(1 == does)
{
manage_class();
does = m_can_do();
}
if(2 == does)
{
manage_stu();
does = m_can_do();
}
if(3 == does)
{
find();
does = m_can_do();
}
if(4 == does)
{
exit(0);
}
}
return 0;
}
/****************************************************函数***********************************/
void welcome()
{
printf("欢迎使用本学生管理系统。\n\n");
}
int check_key(char key[])
{
FILE * fp;
char right_key[20];
int result;
fp = fopen("key", "r");
fscanf(fp, "%s", right_key);
result = strcmp(key, right_key);
return result;
}
int m_can_do()
{
int d;
printf("您可以进行的操作为：\n\n");
printf("1 班级管理 2 学生管理 3 查询 4 退出\n\n请输入：");
scanf("%d", &d);
printf("\n\n");
while(1 != d && 2 != d && 3 != d && 4 != d)
{
printf("您的书有误，请重新输入：");
scanf("%d", &d);
printf("\n\n");
}
return d;
}
/************************************班级办理部分***************************/
int m_class_can_do()
{
int d;
printf("请输入您想要进行的操作：\n\n");
printf("1 添加班级 2 删除班级 3 更改科目\n\n4 返回上一层 5 退出\n\n");
printf("请输入：");
scanf("%d", &d);
printf("\n\n");
while(1 != d && 2 != d && 3 != d && 4 != d && 5 != d)
{
printf("您的输入有误，请重新输入：");
scanf("%d", & d);
printf("\n\n");
}
return d;
}
void manage_class()
{
int does;
does = m_class_can_do();
while(true)
{
if(1 == does)
{
add_class();
does = m_class_can_do();
}
if(2 == does)
{
del_class();
does = m_class_can_do();
}
if(3 == does)
{
change_proj();
does = m_class_can_do();
}
if(4 == does)
{
return;
}
if(5 == does)
{
exit(0);
}
}
}
void add_class()
{
FILE * fp;
char name[20], name1[20];
printf("请输入您想要添加的班级的名字：");
scanf("%s", name);
printf("\n\n");
while((fp = fopen(name, "r")))
{
fclose(fp);
printf("您输入的班级已经存在，请重新输入：");
scanf("%s", name);
printf("\n\n");
}
// fclose(fp);
sprintf(name1, "%s_score", name);
fp = fopen(name, "w");
fclose(fp);
fp = fopen(name1, "w");
fclose(fp);
printf("\n\n");
printf("*************************************************************\n");
printf(" 班级添加成功。 \n");
printf("**************************************************************\n");
}
void del_class()
{
FILE * fp;
char name[20], name1[20];
printf("请输入您想删除的班级名：");
scanf("%s", name);
printf("\n\n");
while(!(fp = fopen(name, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", name);
printf("\n\n");
}
fclose(fp);
sprintf(name1, "%s_score", name);
remove(name);
remove(name1);
printf("**************************************************************\n");
printf(" 班级删除成功。 \n");
printf("**************************************************************\n\n");
}
void change_proj()
{
FILE * fp;
char proj[6][20];
printf("现在的科目信息为：\n\n");
fp = fopen("proj", "r");
fscanf(fp, "%s%s%s%s%s%s", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
//fclose(fp);
// fclose(fp);
printf("%s %s %s %s %s %s", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
printf("\n\n");
printf("请输入您修改后的科目：\n\n");
//getchar();
scanf( "%s%s%s%s%s%s", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
printf("\n\n");
fp = fopen("proj", "w");
fprintf(fp, "%s %s %s %s %s %s", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
fclose(fp);
printf("**************************************************************\n");
printf(" 科目修改成功。 \n");
printf("**************************************************************\n\n");
}
/**************************************************************************学生管理***********************************/
int m_stu_can_do()
{
int d;
printf("您可以进行的操作有：\n\n");
printf("1 登记 2 修改 3 删除某个学生 4 删除某班学生\n\n5 登记分数 6 修改分数 7 返回上一层\n\n8 退出\n\n");
printf("请您输入：");
scanf("%d", &d);
printf("\n\n");
while(1 != d && 2 != d && 3 != d && 4 != d && 5 != d && 6 != d && 7 != d)
{
printf("您的输入有误，请重新输入：");
scanf("%d", &d);
printf("\n\n");
}
return d;
}
void manage_stu()
{
int does;
does = m_stu_can_do();
while(true)
{
if(1 == does)
{
log_stu();
does = m_stu_can_do();
}
if(2 == does)
{
change_stu();
does = m_stu_can_do();
}
if(3 == does)
{
del_stu();
does = m_stu_can_do();
}
if(4 == does)
{
del_clas_stu();
does = m_stu_can_do();
}
if(5 == does)
{
log_score();
does = m_stu_can_do();
}
if(6 == does)
{
change_score();
does = m_stu_can_do();
}
if(7 == does)
{
return;
}
if(8 == does)
{
exit(0);
}
}
}
void log_stu()
{
FILE * fp, * p;
char clas[20], clas1[20];
stu1 add[200];
int i = 0;
printf("请输入您所要添加学生所在班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fclose(fp);
sprintf(clas1, "%s_score", clas);
printf("请按下面提示输入(输入0结束)：\n\n");
printf("学号 姓名 性别 年龄 电话\n\n");
scanf("%d", & add[i]. num);
while(add[i]. num != 0)
{
scanf("%s%s%s%s", add[i]. name, add[i]. sex, add[i]. age, add[i]. phone);
i ++;
printf("\n");
scanf("%d", & add[i]. num);
}
i = 0;
fp = fopen(clas, "a");
p = fopen(clas1, "a");
while(add[i]. num != 0)
{
fprintf(fp, "%d %s %s %s %s\n\n", add[i]. num, add[i]. name, add[i]. sex, add[i]. age, add[i]. phone);
fprintf(p, "0 0 0 0 0 0\n\n");
i++;
}
fclose(fp);
fclose(p);
printf("**************************************************************\n");
printf(" 添加成功。 \n");
printf("**************************************************************\n\n");
}
void change_stu()
{
FILE * fp;
char clas[20];
int num, result, i;
stu1 stu[200];
//sstu2 stud[200];
printf("请输入他所在班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fclose(fp);
// sprintf(clas1"%s_score", clas);
read_stu1(clas, stu);
//read_stud(cls1, stud);
printf("请输入该学生学号：");
scanf("%d", &num);
printf("\n\n");
result = find_stu(stu, num);
if(-1 == result)
{
printf("您输入的学生不存在，请重新输入：");
scanf("%d", & num);
printf("\n\n");
result = find_stu(stu, num);
}
printf("请按下面格式重新输入该学生信息：\n\n");
printf("学号 姓名 性别 年龄 电话\n\n");
scanf("%d%s%s%s%s", & stu[result]. num, stu[result]. name, stu[result]. sex, stu[result]. age, stu[result]. phone);
i = 0;
fp = fopen(clas, "w");
while(0 != stu[i]. num)
{
fprintf(fp, "%d %s %s %s %s\n\n", stu[i]. num, stu[i]. name, stu[i]. sex, stu[i]. age, stu[i]. phone);
i++;
}
fclose(fp);
printf("**************************************************************\n");
printf(" 修改成功。 \n");
printf("**************************************************************\n\n");
}
void read_stu1(char clas[], stu1 stu[])
{
int i = 0;
FILE * fp;
fp = fopen(clas, "r");
while(!feof(fp))
{
fscanf(fp, "%d%s%s%s%s", &stu[i]. num, stu[i]. name, stu[i]. sex, stu[i]. age, stu[i]. phone);
i++;
}
fclose(fp);
stu[i-1]. num = 0;
}
int find_stu(stu1 stu[], int num)
{
int i = 0;
while(stu[i]. num != 0)
{
if(stu[i]. num == num)
{
break;
}
i++;
}
if(stu[i]. num == num)
{
return i;
}
else
{
return -1;
}
}
void del_stu()
{
FILE * fp, * p;
char clas[20], clas1[20];
int num, result, i = 0;
stu1 stu[200];
stu2 stud[200];
printf("请输入他所在班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fclose(fp);
sprintf(clas1, "%s_score", clas);
read_stu1(clas, stu);
read_stu2(clas1, stud);
printf("请输入该学生学号：");
scanf("%d",& num);
printf("\n\n");
result = find_stu(stu, num);
if(-1 == result)
{
printf("您输入的学生不存在，请重新输入：");
scanf("%d", & num);
printf("\n\n");
result = find_stu(stu, num);
}
fp = fopen(clas, "w");
p = fopen(clas1, "w");
while(stu[i]. num != 0)
{
if(stu[i]. num == num)
{
i++;
}
if(stu[i]. num != 0)
{
fprintf(fp, "%d %s %s %s %s\n\n", stu[i]. num, stu[i]. name, stu[i]. sex, stu[i]. age, stu[i]. phone);
fprintf(p, "%d %d %d %d %d %d\n\n", stud[i]. proj1, stud[i]. proj2, stud[i]. proj3, stud[i]. proj4, stud[i]. proj5, stud[i]. proj6);
i++;
}
}
fclose(fp);
fclose(p);
printf("**************************************************************\n");
printf(" 删除成功。 \n");
printf("**************************************************************\n\n");
}
void read_stu2(char clas1[], stu2 stud[])
{
int i = 0;
FILE * fp;
fp = fopen(clas1, "r");
while(!feof(fp))
{
fscanf(fp, "%d%d%d%d%d%d",&stud[i]. proj1, &stud[i]. proj2, &stud[i]. proj3, &stud[i]. proj4, &stud[i]. proj5, &stud[i]. proj6);
i++;
}
stud[i-1]. proj1 = -1;
fclose(fp);
}
void log_score()
{
FILE * fp, * p, * tp;
stu1 stu[200];
stu2 stud;
char clas[20], clas1[20], proj[6][20];
int i = 0;
printf("请输入要登分的班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fclose(fp);
tp = fopen("proj", "r");
fscanf(tp, "%s%s%s%s%s%s", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
fclose(tp);
sprintf(clas1, "%s_score", clas);
read_stu1(clas, stu);
fp = fopen(clas, "r");
p = fopen(clas1, "w");
printf("请输入：\n\n");
printf("学号 姓名 %s %s %s %s %s %s\n\n", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
while(0 != stu[i]. num)
{
printf("%d %s ", stu[i]. num, stu[i]. name);
scanf("%d%d%d%d%d%d", &stud. proj1, &stud. proj2, &stud. proj3, &stud. proj4, &stud. proj5, &stud. proj6);
fprintf(p, "%d %d %d %d %d %d\n\n", stud.proj1 ,stud.proj2 ,stud.proj3 ,stud.proj4 ,stud.proj5 ,stud.proj6);
i++;
}
fclose(fp);
fclose(p);
printf("**************************************************************\n");
printf(" 该班所有学生成绩已登记完毕。 \n");
printf("**************************************************************\n\n");
}
void change_score()
{
FILE * fp, * temp;
char clas[20], clas1[20], proj[6][20];
int num, result, i = 0;
stu1 stu[200];
stu2 stud[200];
printf("请输入他所在班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fclose(fp);
sprintf(clas1, "%s_score", clas);
read_stu1(clas, stu);
//read_stu2(cls1, stud);
printf("请输入该学生学号：");
scanf("%d",& num);
printf("\n\n");
result = find_stu(stu, num);
if(-1 == result)
{
printf("您输入的学生不存在，请重新输入：");
scanf("%d", & num);
printf("\n\n");
result = find_stu(stu, num);
}
temp = fopen("proj", "r");
fscanf(temp, "%s%s%s%s%s%s", proj[1], proj[2], proj[3], proj[4], proj[5], proj[6]);
fclose(temp);
fp = fopen(clas1, "w");
printf("请输入：\n\n");
printf("学号 姓名 %s %s %s %s %s %s", proj[1], proj[2], proj[3], proj[4], proj[5], proj[6]);
printf("%d %s ", stu[result]. num, stu[result]. name);
scanf("%d%d%d%d%d%d", &stud[result]. proj1, &stud[result]. proj2, &stud[result]. proj3, &stud[result]. proj4, &stud[result]. proj5, &stud[result]. proj6);
while(0 != stud[i]. proj1)
{
fprintf(fp,"%d %d %d %d %d %d\n\n", stud[i]. proj1, stud[i]. proj2, stud[i]. proj3, stud[i]. proj4, stud[i]. proj5, stud[i]. proj6);
i++;
}
printf("**************************************************************\n");
printf(" 成绩修改成功。 \n");
printf("**************************************************************\n\n");
}
void del_clas_stu()
{
FILE * fp;
char clas[20], clas1[20];
printf("请输入您想要操作的班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("不存在%s班，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
sprintf(clas1, "%s_score", clas);
fp = fopen(clas, "w");
fclose(fp);
fp = fopen(clas1, "w");
fclose(fp);
printf("*************************************************************\n");
printf(" 删除成功。 \n");
printf("*************************************************************\n\n");
}
/**********************************************查询**********************************************************/
int m_find_can_do()
{
int d;
printf("您可以进行的操作为：\n\n1 查看某班基本信息 2 查看某班成绩 3 查看学生基本信息\n\n4 查看学生全部信息 5 返回上一层 6 退出\n\n请您输入：");
scanf("%d", &d);
printf("\n\n");
while(1 != d && 1 != d && 2 != d && 3 != d && 4 != d && 5 != d && 6 != d)
{
printf("您的输入有误，请重新输入：");
scanf("%d", &d);
printf("\n\n");
}
return d;
}
void find()
{
int does;
does = m_find_can_do();
while(true)
{
if(1 == does)
{
find_clas_basic();
does = m_find_can_do();
}
if(2 == does)
{
find_clas_score();
does = m_find_can_do();
}
if(3 == does)
{
find_stu_basic();
does = m_find_can_do();
}
if(4 == does)
{
find_stu_all();
does = m_find_can_do();
}
if(5 == does)
{
return ;
}
if(6 == does)
{
exit(0);
}
}
}
void find_clas_basic()
{
FILE * fp;
stu1 stu[200];
char clas[20];
int i = 0, d;
printf("请输入您想要查看的班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fscanf(fp, "%d", &d);
if(feof(fp))
{
printf("**************************************************************\n");
printf(" 您查看的班级没有学生。 \n");
printf("**************************************************************\n");
fclose(fp);
return ;
}
read_stu1(clas, stu);
printf("学号 姓名 性别 年龄 电话\n\n");
while(0 != stu[i]. num)
{
printf("%d %s %s %s %s\n\n", stu[i]. num, stu[i]. name, stu[i]. sex, stu[i]. age, stu[i]. phone);
i++;
}
}
void find_clas_score()
{
FILE * fp, * temp;
stu1 stu[200];
stu2 stud[200];
char clas[20], clas1[20], proj[6][20];
int i = 0, d;
printf("请输入您想要查看的班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fscanf(fp, "%d", &d);
if(feof(fp))
{
printf("**************************************************************\n");
printf(" 您查看的班级没有学生。 \n");
printf("**************************************************************\n\n");
fclose(fp);
return ;
}
fclose(fp);
sprintf(clas1, "%s_score", clas);
read_stu1(clas, stu);
read_stu2(clas1, stud);
temp = fopen("proj", "r");
fscanf(temp, "%s%s%s%s%s%s", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
fclose(temp);
printf("学号 姓名 %s %s %s %s %s %s\n\n", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
while(0 != stu[i]. num)
{
printf("%d %s ", stu[i]. num, stu[i]. name);
printf("%d %d %d %d %d %d\n\n", stud[i].proj1, stud[i].proj2, stud[i].proj3, stud[i].proj4, stud[i].proj5, stud[i].proj6);
i++;
}
}
void find_stu_basic()
{
stu1 stu[200];
int result, num;
char clas[20];
FILE * fp;
printf("请输入他所在班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fclose(fp);
read_stu1(clas, stu);
printf("请输入该学生学号：");
scanf("%d", & num);
printf("\n\n");
result = find_stu(stu, num);
while(-1 == result)
{
printf("该学生不存在，请重新输入：");
scanf("%d", &num);
printf("\n\n");
}
printf("该学生信息为：\n\n学号 姓名 性别 年龄 电话\n\n");
printf("%d %s %s %s %s\n\n", stu[result]. num, stu[result]. name, stu[result]. sex, stu[result]. age, stu[result]. phone);
}
void find_stu_all()
{
stu1 stu[200];
stu2 stud[200];
int result, num;
char clas[20], clas1[20], proj[6][20];
FILE * fp, * temp;
printf("请输入他所在班级：");
scanf("%s", clas);
printf("\n\n");
while(!(fp = fopen(clas, "r")))
{
printf("您输入的班级不存在，请重新输入：");
scanf("%s", clas);
printf("\n\n");
}
fclose(fp);
sprintf(clas1, "%s_score", clas);
read_stu1(clas, stu);
read_stu2(clas1, stud);
printf("请输入该学生学号：");
scanf("%d", & num);
printf("\n\n");
result = find_stu(stu, num);
while(-1 == result)
{
printf("该学生不存在，请重新输入：");
scanf("%d", &num);
printf("\n\n");
}
temp = fopen("proj", "r");
fscanf(temp, "%s%s%s%s%s%s", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
fclose(temp);
printf("该学生全部信息如下：\n\n");
printf("该学生信息为：\n\n学号 姓名 性别 年龄 电话\n\n");
printf("%d %s %s %s %s\n\n", stu[result]. num, stu[result]. name, stu[result]. sex, stu[result]. age, stu[result]. phone);
printf("成绩:\n\n");
printf("%s %s %s %s %s %s\n\n", proj[0], proj[1], proj[2], proj[3], proj[4], proj[5]);
printf("%d %d %d %d %d %d\n\n", stud[result]. proj1, stud[result]. proj2, stud[result]. proj3, stud[result]. proj4, stud[result]. proj5, stud[result]. proj6);
}
④ 学生成绩管理系统C语言代码
#include"stdio.h"
#include<string.h>
#include<stdlib.h>
#define N 30
struct student
{
int num;
char name[20];
int age;
int Math;
int English;
int Physical;
long int sum;
}stu[N];
enter()
{int i,n;
printf("How many students(1-%d)?:",N);
scanf("%d",&n);
printf("\nEnter data now\n\n");
for(i=0;i<n;i++)
{printf("\n Input %dth student record.\n",i+1);
input(i);
}
if(i!=0) save(n);
printf_back(); /* browse or back */
}
add()
{int i,n,m,k;
FILE *fp;
n=load();
printf("How many students are you want to add(1-%d)?:",N-n);
scanf("%d",&m);
k=m+n;
for(i=n;i<k;i++)
{printf("\n Input %dth student record.\n",i+1);
input(i);
}
if((fp=fopen("score.txt","ab"))==NULL)
{printf("Cannot open file.\n");
}
for(i=n;i<k;i++)
if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)
printf("file write error.\n");
fclose(fp);
printf_back();
}
/* insert()
{int n,c;
struct student s;
n=load();
puts("\n Input one data.\n");
do
{input(n);
printf_face();
printf_one(n);
printf("\n\nAre you sure?\n\n\t 1.Sure\t2.cancel and again\t3.Back without save [ ]\b\b");
scanf("%d",&c);
if(c==1)
{
save(n+1);
printf_back();
}
else if(c!=2) menu();
}
while(c==2);
} */
modify()
{struct student s;
FILE *fp;
int i,n,k,w0=1,w1,w2=0;
n=load();
do
{
k=-1;
printf_face();
for(i=0;i<n;i++)
{if((i!=0)&&(i%10==0))
{printf("\n\nRemember NO.031073- which needed modify.Pass any key to continue ...");
getch();
puts("\n\n");
}
printf_one(i);
printf("\n");
}
do
{printf("\n\nEnter NO.031073- that you want to modify! NO.:031073-");
scanf("%d",&s.num);
for(i=0;i<n;i++)
if(s.num==stu[i].num)
{k=i;
s=stu[i]; /* chengji beifei */
}
if(k==-1) printf("\n\nNO exist!please again");
}
while(k==-1);
printf_face();
printf_one(k);
w1=modify_data(k,n);
if(w1==1)
{printf("\nSuccessful ^_^.\n\nAre you modify another?\n\n\t1.Yes2.Back with save\t[ ]\b\b");
scanf("%d",&w0);
w2=1;
}
else
{w0=0; /* end */
if(w2==1)
stu[k]=s;
}
if(w0!=1&&w2==1) save(n); /* w0!=1 return w2==1 modify */
}
while(w0==1);
menu();
}
delete()
{struct student s;
FILE *fp;
int i,n,k,w0=1,w1,w2=0;
n=load();
do
{
k=-1;
printf_face();
for(i=0;i<n;i++)
{if((i!=0)&&(i%10==0))
{printf("\n\nRemember NO.031073- which needed delete.Pass any key to continue ...");
getch();
puts("\n\n");
}
printf_one(i);
printf("\n");
}
do
{printf("\n\nEnter NO.031073- that you want to delete! NO.:031073-");
scanf("%d",&s.num);
for(i=0;i<n;i++)
if(s.num==stu[i].num)
{k=i;
s=stu[i]; /* chengji beifei */
}
if(k==-1) printf("\n\nNO exist!please again");
}
while(k==-1);
printf_face();
printf_one(k);
printf("\nAre you sure?\n\n\t1.Sure2.Back without save in this time [ ]\b\b");
scanf("%d",&w1);
if(w1==1)
{
stu[k].sum=0;
printf("\nSuccessful ^_^.\n\nAre you delete another?\n\n\t1.Yes2.Back with save\t[ ]\b\b");
scanf("%d",&w0);
w2=1;
}
else
{w0=0; /* end */
if(w2==1)
stu[k]=s;
}
if(w0!=1&&w2==1) save(n);
}
while(w0==1);
menu();
}
modify_score()
{struct student s;
FILE *fp;
int i,n,k,w0=1,w1,w2=0;
n=load();
do
{
k=-1;
printf_face();
for(i=0;i<n;i++)
{if((i!=0)&&(i%10==0))
{printf("\n\nRemember NO.031073 which score needed modify.Pass any key to continue ...");
getch();
puts("\n\n");
}
printf_one(i);
printf("\n");
}
do
{printf("\n\nEnter NO.031073- that you want to modify! NO.:031073-");
scanf("%d",&s.num);
for(i=0;i<n;i++)
if(s.num==stu[i].num)
{k=i;
s=stu[i]; /* chengji beifei */
}
if(k==-1) printf("\n\nNO exist!please again");
}
while(k==-1);
printf_face();
printf_one(k);
w1=modify_score1(k);
if(w1==1)
{printf("\nSuccessful ^_^.\n\nAre you modify another score?\n\n\t1.Yes2.Back with save\t[ ]\b\b");
scanf("%d",&w0);
w2=1;
}
else
{w0=0; /* end */
if(w2==1)
stu[k]=s;
}
if(w0!=1&&w2==1) save(n); /* w0!=1 return w2==1 modify */
}
while(w0==1);
menu();
}
order()
{int i,j,k,n;
struct student s;
n=load();
for(i=0;i<n-1;i++)
{k=i;
for(j=i+1;j<n;j++)
if(stu[j].num<stu[k].num) k=j;
s=stu[i];stu[i]=stu[k];stu[k]=s;
}
save(n);
puts("\n\n");
printf_back();
}
browse()
{int i,j,n;
n=load();
printf_face();
for(i=0;i<n;i++)
{if((i!=0)&&(i%10==0))
{printf("\n\nPass any key to contiune ...");
getch();
puts("\n\n");
}
printf_one(i);
printf("\n");
}
printf("\tThere are %d record.\n",n);
printf("\nPass any key to back...");
getch();
menu();
}
save(int n)
{FILE *fp;
int i;
if((fp=fopen("score.txt","wb"))==NULL)
{printf("\nCannot open file\n");
return NULL;
}
for(i=0;i<n;i++)
if(stu[i].sum!=0)
if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)
printf("file write error\n");
fclose(fp);
}
load()
{FILE *fp;
int i;
if((fp=fopen("score.txt","rb"))==NULL)
{printf("\nCannot open file\n");
return NULL;
}
for(i=0;!feof(fp);i++)
fread(&stu[i],sizeof(struct student),1,fp);
fclose(fp);
return(i-1);
}
no_input(int i,int n)
{int k,w1;
do
{w1=0;
printf("NO.:031073-");
scanf("%d",&stu[i].num);
if(stu[i].num<1 || stu[i].num>N)
{puts("Input error! Only be made up of(1-N).Please reinput!\n");
w1=1;
}
if(w1!=1)
for(k=0;k<n;k++)
if(k!=i&&(stu[k].num==stu[i].num))
{puts("This record is exist. Please reinput!\n");
w1=1;break;
}
}
while(w1==1);
}
enter_score(int i)
{printf("Math English Physical");
scanf("%d %d %d",&stu[i].Math,&stu[i].English,&stu[i].Physical);
}
sum(int i)
{
stu[i].sum=stu[i].Math+stu[i].English+stu[i].Physical;
}
input(int i)
{no_input(i,i);
printf("name: age:");
scanf("%s %d",stu[i].name,&stu[i].age);
enter_score(i);
sum(i);
}
modify_score1(int i)
{int c,w1;
do
{
puts("\nmodify by=>\n\n 1.Math 2.English 3.Physical4.all score 5.cancel and back");
printf("Which you needed?:[ ]\b\b");
scanf("%d",&c);
if(c>5||c<1)
{puts("\nChoice error! Please again!");
getchar();
}
}
while(c>5||c<1);
do
{switch(c)
{
case 1:printf("Math:");scanf("%d",&stu[i].Math);break;
case 2:printf("English:");scanf("%d",&stu[i].English);break;
case 3:printf("Physical:");scanf("%d",&stu[i].Physical);break;
case 4:enter_score(i);break;
case 5:break;
}
if(c>0&&c<5) sum(i);
puts("\nNow:\n");
printf_face();
printf_one(i);
printf("\nAre you sure?\n\n\t1.Sure 2.No and remodify3.Back without save in this time [ ]\b\b");
scanf("%d",&w1);
}
while(w1==2);
return(w1);
}
modify_data(int i,int n)
{int c,w1;
do
{
puts("\nmodify by=>\n\n 1.NO. 2.name 3.age 4.Math 5.English 6.Physical7.all score 8.all data 9.cancel and back");
printf("Which you needed?:[ ]\b\b");
scanf("%d",&c);
if(c>9||c<1)
{puts("\nChoice error! Please again!");
getchar();
}
}
while(c>9||c<1);
do
{switch(c)
{case 1:no_input(i,n);break;
case 2:printf("name:");scanf("%s",stu[i].name);break;
case 3:printf("age:");scanf("%d",&stu[i].age);break;
case 4:printf("Math:");scanf("%d",&stu[i].Math);break;
case 5:printf("English:");scanf("%d",&stu[i].English);break;
case 6:printf("Physical:");scanf("%d",&stu[i].Physical);break;
case 7:enter_score(i);break;
case 8:input(i);break;
case 9:break;
}
if(c>3&&c<8) sum(i);
puts("\nNow:\n");
printf_face();
printf_one(i);
printf("\nAre you sure?\n\n\t1.Sure 2.No and remodify3.Back without save in this time [ ]\b\b");
scanf("%d",&w1);
}
while(w1==2);
return(w1);
}
printf_face()
{printf("\nNO.031073 name age Math English Physical sum\n");
}
printf_one(int i)
{
printf("%6d %8s %4d",stu[i].num,stu[i].name,stu[i].age);
printf("%5d %5d %8d %10d",stu[i].Math,stu[i].English,stu[i].Physical,stu[i].sum);
}
printf_back()
{int k,w;
printf("\n\n\tSuccessful.^_^\n\n");
printf("What do you want to do?\n\n\t1.Browse all now\t2.Back:[ ]\b\b");
scanf("%d",&w);
if(w==1) browse();
else menu();
}
menu()
{int w1;
char n;
do
{
puts("\t\t****************MENU****************\n\n");
puts("\t\t\t\tA.Enter new data");
puts("\t\t\t\tB.Addition data");
puts("\t\t\t\tC.Modify data");
puts("\t\t\t\tD.Delete data");
puts("\t\t\t\tE.Modify score");
puts("\t\t\t\tF.Order by number");
puts("\t\t\t\tG.Browse all");
puts("\t\t\t\tH.Exit");
puts("\n\n\t\t************************************\n");
printf("Choice your number(A-H):[ ]\b\b");
n=getchar();
printf("\n");
if(n<'A'||n>'H')
w1=1;
else w1=0;
}
while(w1==1);
switch(n)
{case 'A':enter();break;
case 'B':add();break;
case 'C':modify();break;
case 'D':delete();break;
case 'E':modify_score();break;
case 'F':order();break;
case 'G':browse();break;
case 'H':exit(0);
}
}
char password[7]="123456";
main()
{
char s[7];
printf("\t\t请输入密码:\n\t\t\n\t\t");
scanf("%s",s);
if(!strcmp(s,password))
{
printf("\n\t\t恭喜你进入学生成绩管理系统\n");
menu();
}
else
{
printf("\t\t 密码错误\n\n");
main();
}
}
⑤ 学生成绩管理系统C语言编程
||#include<stdio.h> /*引用库函数*/
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
typedef struct /*定义结构体数组*/
{
char num[10]; /*学号*/
char name[20]; /*姓名*/
int score; /*成绩*/
}Student;
Student stu[80]; /*结构体数组变量*/
int menu_select() /*菜单函数*/
{
char c;
do{
system("cls"); /*运行前清屏*/
printf("\t\t****Students' Grade Management System****\n"); /*菜单选择*/
printf("\t\t | 1. Input Records |\n");
printf("\t\t | 2. Display All Records |\n");
printf("\t\t | 3. Sort |\n");
printf("\t\t | 4. Insert a Record |\n");
printf("\t\t | 5. Delete a Record |\n");
printf("\t\t | 6. Query |\n");
printf("\t\t | 7. Statistic |\n");
printf("\t\t | 8. Add Records from a Text File|\n");
printf("\t\t | 9. Write to a Text file |\n");
printf("\t\t | 0. Quit |\n");
printf("\t\t*****************************************\n");
printf("\t\t\tGive your Choice(0-9):");
c=getchar(); /*读入选择*/
}while(c<'0'||c>'9');
return(c-'0'); /*返回选择*/
}
int Input(Student stud[],int n) /*输入若干条记录*/
{int i=0;
char sign,x[10]; /*x[10]为清除多余的数据所用*/
while(sign!='n'&&sign!='N') /*判断*/
{ printf("\t\t\tstudent's num:"); /*交互输入*/
scanf("\t\t\t%s",stud[n+i].num);
printf("\t\t\tstudent's name:");
scanf("\t\t\t%s",stud[n+i].name);
printf("\t\t\tstudent's score:");
scanf("\t\t\t%d",&stud[n+i].score);
gets(x); /*清除多余的输入*/
printf("\t\t\tany more records?(Y/N)");
scanf("\t\t\t%c",&sign); /*输入判断*/
i++;
}
return(n+i);
}
void Display(Student stud[],int n) /*显示所有记录*/
{
int i;
printf("\t\t\t-----------------------------------\n"); /*格式头*/
printf("\t\t\tnumber name score\n");
printf("\t\t\t-----------------------------------\n");
for(i=1;i<n+1;i++) /*循环输入*/
{
printf("\t\t\t%-16s%-15s%d\n",stud[i-1].num,stud[i-1].name,stud[i-1].score);
if(i>1&&i%10==0) /*每十个暂停*/
{printf("\t\t\t-----------------------------------\n"); /*格式*/
printf("\t\t\t");
system("pause");
printf("\t\t\t-----------------------------------\n");
}
}
printf("\t\t\t");
system("pause");
}
void Sort_by_num(Student stud[],int n) /*按学号排序*/
{ int i,j,*p,*q,s;
char t[10];
for(i=0;i<n-1;i++) /*冒泡法排序*/
for(j=0;j<n-1-i;j++)
if(strcmp(stud[j].num,stud[j+1].num)>0)
{strcpy(t,stud[j+1].num);
strcpy(stud[j+1].num,stud[j].num);
strcpy(stud[j].num,t);
strcpy(t,stud[j+1].name);
strcpy(stud[j+1].name,stud[j].name);
strcpy(stud[j].name,t);
p=&stud[j+1].score;
q=&stud[j].score;
s=*p;
*p=*q;
*q=s;
}
}
int Insert_a_record(Student stud[],int n) /*插入一条记录*/
{char x[10]; /*清除多余输入所用*/
printf("\t\t\tstudent's num:"); /*交互式输入*/
scanf("\t\t\t%s",stud[n].num);
printf("\t\t\tstudent's name:");
scanf("\t\t\t%s",stud[n].name);
printf("\t\t\tstudent's score:");
scanf("\t\t\t%d",&stud[n].score);
gets(x);
n++;
Sort_by_num(stud,n); /*调用排序函数*/
printf("\t\t\tInsert Successed!\n"); /*返回成功信息*/
return(n);
}
int Delete_a_record(Student stud[],int n) /*按姓名查找，删除一条记录*/
{ char s[20];
int i=0,j;
printf("\t\t\ttell me his(her) name:"); /*交互式问寻*/
scanf("%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判断*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*返回失败信息*/
return(n);
}
for(j=i;j<n-1;j++) /*删除操作*/
{
strcpy(stud[j].num,stud[j+1].num);
strcpy(stud[j].name,stud[j+1].name);
stud[j].score=stud[j+1].score;
}
printf("\t\t\tDelete Successed!\n"); /*返回成功信息*/
return(n-1);
}
void Query_a_record(Student stud[],int n) /*查找并显示一个记录*/
{ char s[20];
int i=0;
printf("\t\t\tinput his(her) name:"); /*交互式输入*/
scanf("\t\t\t%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判断*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*输入失败信息*/
return;
}
printf("\t\t\this(her) number:%s\n",stud[i].num); /*输出该学生信息*/
printf("\t\t\this(her) score:%d\n",stud[i].score);
}
void Statistic(Student stud[],int n) /*新增功能，输出统计信息*/
{ int i,j=0,k=0,sum=0;
float aver; /*成绩平均值*/
for(i=0;i<n;i++) /*循环输入判断*/
{
sum+=stud[i].score;
if(stud[j].score>stud[i].score) j=i;
if(stud[k].score<stud[i].score) k=i;
}
aver=1.0*sum/n;
printf("\t\t\tthere are %d records.\n",n); /*总共记录数*/
printf("\t\t\tthe hignest score:\n"); /*最高分*/
printf("\t\t\tnumber:%s name:%s score:%d\n",stud[j].num,stud[j].name,stud[j].score);
printf("\t\t\tthe lowest score:\n"); /*最低分*/
printf("\t\t\tnumber:%s name:%s score:%d\n",stud[k].num,stud[k].name,stud[k].score);
printf("\t\t\tthe average score is %5.2f\n",aver); /*平均分*/
}
int AddfromText(Student stud[],int n) /*从文件中读入数据*/
{ int i=0,num;
FILE *fp; /*定义文件指针*/
char filename[20]; /*定义文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename); /*输入文件名*/
if((fp=fopen(filename,"rb"))==NULL) /*打开文件*/
{ printf("\t\t\tcann't open the file\n"); /*打开失败信息*/
printf("\t\t\t");
system("pause");
return(n);
}
fscanf(fp,"%d",&num); /*读入总记录量*/
while(i<num) /*循环读入数据*/
{
fscanf(fp,"%s%s%d",stud[n+i].num,stud[n+i].name,&stud[n+i].score);
i++;
}
n+=num;
fclose(fp); /*关闭文件*/
printf("\t\t\tSuccessed!\n");
printf("\t\t\t");
system("pause");
return(n);
}
void WritetoText(Student stud[],int n) /*将所有记录写入文件*/
{
int i=0;
FILE *fp; /*定义文件指针*/
char filename[20]; /*定义文件名*/
printf("\t\t\tWrite Records to a Text File\n"); /*输入文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename);
if((fp=fopen(filename,"w"))==NULL) /*打开文件*/
{
printf("\t\t\tcann't open the file\n");
system("pause");
return;
}
fprintf(fp,"%d\n",n); /*循环写入数据*/
while(i<n)
{
fprintf(fp,"%-16s%-15s%d\n",stud[i].num,stud[i].name,stud[i].score);
i++;
}
fclose(fp); /*关闭文件*/
printf("Successed!\n"); /*返回成功信息*/
}
void main() /*主函数*/
{
int n=0;
for(;;)
{
switch(menu_select()) /*选择判断*/
{
case 1:
printf("\t\t\tInput Records\n"); /*输入若干条记录*/
n=Input(stu,n);
break;
case 2:
printf("\t\t\tDisplay All Records\n"); /*显示所有记录*/
Display(stu,n);
break;
case 3:
printf("\t\t\tSort\n");
Sort_by_num(stu,n); /*按学号排序*/
printf("\t\t\tSort Suceessed!\n");
printf("\t\t\t");
system("pause");
break;
case 4:
printf("\t\t\tInsert a Record\n");
n=Insert_a_record(stu,n); /*插入一条记录*/
printf("\t\t\t");
system("pause");
break;
case 5:
printf("\t\t\tDelete a Record\n");
n=Delete_a_record(stu,n); /*按姓名查找，删除一条记录*/
printf("\t\t\t");
system("pause");
break;
case 6:
printf("\t\t\tQuery\n");
Query_a_record(stu,n); /*查找并显示一个记录*/
printf("\t\t\t");
system("pause");
break;
case 7:
printf("\t\t\tStatistic\n");
Statistic(stu,n); /*新增功能，输出统计信息*/
printf("\t\t\t");
system("pause");
break;
case 8:
printf("\t\t\tAdd Records from a Text File\n");
n=AddfromText(stu,n); /*新增功能，输出统计信息*/
break;
case 9:
printf("\t\t\tWrite to a Text file\n");
WritetoText(stu,n); /*循环写入数据*/
printf("\t\t\t");
system("pause");
break;
case 0:
printf("\t\t\tHave a Good Luck,Bye-bye!\n"); /*结束程序*/
printf("\t\t\t");
system("pause");
exit(0);
}
}
}
四、函数调用关系图
注：“→”代表调用
Input函数
打印链表记录
Display函数
输入若干条记录
menu_select()函数
选择菜单
Sort_by_num函数
显示所有记录
Delete_a_record函数
按姓名查找，删除一条记录
Query_a_record查找并显示一条记录
Statistic函数
输出统计信息 （新增）
AddfromText函数
从正文中添加数据到结构体数组中
Main函数
Insert_a_record插入一条记录
WritetoText函数 将所有数据写入文件中
退出程序
Reverse(head)函数
按学号排序
五、设计测试流程
1、进入界面
2、输入选项1，回车；
按提示输入数据：
3、回到主菜单；
输入选项7，回车；
输入文件名：data.txt，回车；
出现成功提示，则读入文件操作成功。
4、回到主菜单，输入2，回车
每10个暂停显示数据
5、回到主菜单，输入3，回车
出现排序成功信息。
6、回到主菜单，输入4，回车
按提示插入一组数据
7、回到主菜单，输入5，回车
按提示输入姓名，删除数据
出现删除成功的信息
8、回到主菜单，输入6，回车
输入姓名进行查询
9、回到主菜单，输入7，回车
出现统计信息
10、回到主菜单，输入9，回车
输入result.txt，回车
出现成功写入文件的信息
11、回到主菜单，输入0，回车退出系统
回答者：kingkey001 - 试用期 一级 7-14 22:38
修改答复： kingkey001，您要修改的答复如下: 积分规则 关闭
C语言课程设计报告-------学生成绩简单管理程序
一、系统菜单的主要功能
（1）输入若干条记录
（2）显示所有记录
（3）按学号排序
（4）插入一条记录
（5）按姓名查找，删除一条记录
（6）查找并显示一条记录
（7）输出统计信息 （新增）
（8）从正文中添加数据到结构体数组中
（9）将所有数据写入文件中
（0）退出程序
二、题目分析
该题主要考察学生对结构体，指针，文件的操作，以及C语言算法的掌握,所以完成此道题目要求较强的设计能力，尤其是要有一种大局观的意识。如何调程序也非常重要，通过这个程序可以学习到以前调试短程序没有的的经验。
菜单中的每一个选项都对应一个子程序，子程序的算法几乎囊获了所有C语言学过的技巧，下面就各个子程序中的功能进行说明：
功能1和4的算法相似，输入一条记录到结构体中去，其中有一部很关键，就是通过gets将所有的多余的字符，回车读去，否则就会出错。
功能2是显示所有的记录，通过循环输出，格式也比较重要。
功能3为按学号排序，因为学号定义成了字符数组的形式，因此在运用冒泡法进行排序的时候，要用到strcmp,strcpy等函数。
功能5为按姓名删除记录，先输入姓名，再一一比较，如果没有则返回失败信息，如果找到就将此记录都向前移一位，返回n-1。
功能6的算法在5中就已经体现了，输入姓名，一一比较。
功能7为新增的功能，因为考虑到原来给出的函数中竟然没有对学生成绩的统计功能，因此新增此功能，可以得出所有的记录个数，最高、最低、平均分，并输出相关的学生信息等。
功能8和9是对文件的操作，提前准备好数据。
三、程序正文部分
#include<stdio.h> /*引用库函数*/
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
typedef struct /*定义结构体数组*/
{
char num[10]; /*学号*/
char name[20]; /*姓名*/
int score; /*成绩*/
}Student;
Student stu[80]; /*结构体数组变量*/
int menu_select() /*菜单函数*/
{
char c;
do{
system("cls"); /*运行前清屏*/
printf("\t\t****Students' Grade Management System****\n"); /*菜单选择*/
printf("\t\t | 1. Input Records |\n");
printf("\t\t | 2. Display All Records |\n");
printf("\t\t | 3. Sort |\n");
printf("\t\t | 4. Insert a Record |\n");
printf("\t\t | 5. Delete a Record |\n");
printf("\t\t | 6. Query |\n");
printf("\t\t | 7. Statistic |\n");
printf("\t\t | 8. Add Records from a Text File|\n");
printf("\t\t | 9. Write to a Text file |\n");
printf("\t\t | 0. Quit |\n");
printf("\t\t*****************************************\n");
printf("\t\t\tGive your Choice(0-9):");
c=getchar(); /*读入选择*/
}while(c<'0'||c>'9');
return(c-'0'); /*返回选择*/
}
int Input(Student stud[],int n) /*输入若干条记录*/
{int i=0;
char sign,x[10]; /*x[10]为清除多余的数据所用*/
while(sign!='n'&&sign!='N') /*判断*/
{ printf("\t\t\tstudent's num:"); /*交互输入*/
scanf("\t\t\t%s",stud[n+i].num);
printf("\t\t\tstudent's name:");
scanf("\t\t\t%s",stud[n+i].name);
printf("\t\t\tstudent's score:");
scanf("\t\t\t%d",&stud[n+i].score);
gets(x); /*清除多余的输入*/
printf("\t\t\tany more records?(Y/N)");
scanf("\t\t\t%c",&sign); /*输入判断*/
i++;
}
return(n+i);
}
void Display(Student stud[],int n) /*显示所有记录*/
{
int i;
printf("\t\t\t-----------------------------------\n"); /*格式头*/
printf("\t\t\tnumber name score\n");
printf("\t\t\t-----------------------------------\n");
for(i=1;i<n+1;i++) /*循环输入*/
{
printf("\t\t\t%-16s%-15s%d\n",stud[i-1].num,stud[i-1].name,stud[i-1].score);
if(i>1&&i%10==0) /*每十个暂停*/
{printf("\t\t\t-----------------------------------\n"); /*格式*/
printf("\t\t\t");
system("pause");
printf("\t\t\t-----------------------------------\n");
}
}
printf("\t\t\t");
system("pause");
}
void Sort_by_num(Student stud[],int n) /*按学号排序*/
{ int i,j,*p,*q,s;
char t[10];
for(i=0;i<n-1;i++) /*冒泡法排序*/
for(j=0;j<n-1-i;j++)
if(strcmp(stud[j].num,stud[j+1].num)>0)
{strcpy(t,stud[j+1].num);
strcpy(stud[j+1].num,stud[j].num);
strcpy(stud[j].num,t);
strcpy(t,stud[j+1].name);
strcpy(stud[j+1].name,stud[j].name);
strcpy(stud[j].name,t);
p=&stud[j+1].score;
q=&stud[j].score;
s=*p;
*p=*q;
*q=s;
}
}
int Insert_a_record(Student stud[],int n) /*插入一条记录*/
{char x[10]; /*清除多余输入所用*/
printf("\t\t\tstudent's num:"); /*交互式输入*/
scanf("\t\t\t%s",stud[n].num);
printf("\t\t\tstudent's name:");
scanf("\t\t\t%s",stud[n].name);
printf("\t\t\tstudent's score:");
scanf("\t\t\t%d",&stud[n].score);
gets(x);
n++;
Sort_by_num(stud,n); /*调用排序函数*/
printf("\t\t\tInsert Successed!\n"); /*返回成功信息*/
return(n);
}
int Delete_a_record(Student stud[],int n) /*按姓名查找，删除一条记录*/
{ char s[20];
int i=0,j;
printf("\t\t\ttell me his(her) name:"); /*交互式问寻*/
scanf("%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判断*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*返回失败信息*/
return(n);
}
for(j=i;j<n-1;j++) /*删除操作*/
{
strcpy(stud[j].num,stud[j+1].num);
strcpy(stud[j].name,stud[j+1].name);
stud[j].score=stud[j+1].score;
}
printf("\t\t\tDelete Successed!\n"); /*返回成功信息*/
return(n-1);
}
void Query_a_record(Student stud[],int n) /*查找并显示一个记录*/
{ char s[20];
int i=0;
printf("\t\t\tinput his(her) name:"); /*交互式输入*/
scanf("\t\t\t%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判断*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*输入失败信息*/
return;
}
printf("\t\t\this(her) number:%s\n",stud[i].num); /*输出该学生信息*/
printf("\t\t\this(her) score:%d\n",stud[i].score);
}
void Statistic(Student stud[],int n) /*新增功能，输出统计信息*/
{ int i,j=0,k=0,sum=0;
float aver; /*成绩平均值*/
for(i=0;i<n;i++) /*循环输入判断*/
{
sum+=stud[i].score;
if(stud[j].score>stud[i].score) j=i;
if(stud[k].score<stud[i].score) k=i;
}
aver=1.0*sum/n;
printf("\t\t\tthere are %d records.\n",n); /*总共记录数*/
printf("\t\t\tthe hignest score:\n"); /*最高分*/
printf("\t\t\tnumber:%s name:%s score:%d\n",stud[j].num,stud[j].name,stud[j].score);
printf("\t\t\tthe lowest score:\n"); /*最低分*/
printf("\t\t\tnumber:%s name:%s score:%d\n",stud[k].num,stud[k].name,stud[k].score);
printf("\t\t\tthe average score is %5.2f\n",aver); /*平均分*/
}
int AddfromText(Student stud[],int n) /*从文件中读入数据*/
{ int i=0,num;
FILE *fp; /*定义文件指针*/
char filename[20]; /*定义文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename); /*输入文件名*/
if((fp=fopen(filename,"rb"))==NULL) /*打开文件*/
{ printf("\t\t\tcann't open the file\n"); /*打开失败信息*/
printf("\t\t\t");
system("pause");
return(n);
}
fscanf(fp,"%d",&num); /*读入总记录量*/
while(i<num) /*循环读入数据*/
{
fscanf(fp,"%s%s%d",stud[n+i].num,stud[n+i].name,&stud[n+i].score);
i++;
}
n+=num;
fclose(fp); /*关闭文件*/
printf("\t\t\tSuccessed!\n");
printf("\t\t\t");
system("pause");
return(n);
}
void WritetoText(Student stud[],int n) /*将所有记录写入文件*/
{
int i=0;
FILE *fp; /*定义文件指针*/
char filename[20]; /*定义文件名*/
printf("\t\t\tWrite Records to a Text File\n"); /*输入文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename);
if((fp=fopen(filename,"w"))==NULL) /*打开文件*/
{
printf("\t\t\tcann't open the file\n");
system("pause");
return;
}
fprintf(fp,"%d\n",n); /*循环写入数据*/
while(i<n)
{
fprintf(fp,"%-16s%-15s%d\n",stud[i].num,stud[i].name,stud[i].score);
i++;
}
fclose(fp); /*关闭文件*/
printf("Successed!\n"); /*返回成功信息*/
}
void main() /*主函数*/
{
int n=0;
for(;;)
{
switch(menu_select()) /*选择判断*/
{
case 1:
printf("\t\t\tInput Records\n"); /*输入若干条记录*/
n=Input(stu,n);
break;
case 2:
printf("\t\t\tDisplay All Records\n"); /*显示所有记录*/
Display(stu,n);
break;
case 3:
printf("\t\t\tSort\n");
Sort_by_num(stu,n); /*按学号排序*/
printf("\t\t\tSort Suceessed!\n");
printf("\t\t\t");
system("pause");
break;
case 4:
printf("\t\t\tInsert a Record\n");
n=Insert_a_record(stu,n); /*插入一条记录*/
printf("\t\t\t");
system("pause");
break;
case 5:
printf("\t\t\tDelete a Record\n");
n=Delete_a_record(stu,n); /*按姓名查找，删除一条记录*/
printf("\t\t\t");
system("pause");
break;
case 6:
printf("\t\t\tQuery\n");
Query_a_record(stu,n); /*查找并显示一个记录*/
printf("\t\t\t");
system("pause");
break;
case 7:
printf("\t\t\tStatistic\n");
Statistic(stu,n); /*新增功能，输出统计信息*/
printf("\t\t\t");
system("pause");
break;
case 8:
printf("\t\t\tAdd Records from a Text File\n");
n=AddfromText(stu,n); /*新增功能，输出统计信息*/
break;
case 9:
printf("\t\t\tWrite to a Text file\n");
WritetoText(stu,n); /*循环写入数据*/
printf("\t\t\t");
system("pause");
break;
case 0:
printf("\t\t\tHave a Good Luck,Bye-bye!\n"); /*结束程序*/
printf("\t\t\t");
system("pause");
exit(0);
}
}
}
四、函数调用关系图
注：“→”代表调用
Input函数
打印链表记录
Display函数
输入若干条记录
menu_select()函数
选择菜单
Sort_by_num函数
显示所有记录
Delete_a_record函数
按姓名查找，删除一条记录
Query_a_record查找并显示一条记录
Statistic函数
输出统计信息 （新增）
AddfromText函数
从正文中添加数据到结构体数组中
Main函数
Insert_a_record插入一条记录
WritetoText函数 将所有数据写入文件中
退出程序
Reverse(head)函数
按学号排序
五、设计测试流程
1、进入界面
2、输入选项1，回车；
按提示输入数据：
3、回到主菜单；
输入选项7，回车；
输入文件名：data.txt，回车；
出现成功提示，则读入文件操作成功。
4、回到主菜单，输入2，回车
每10个暂停显示数据
5、回到主菜单，输入3，回车
出现排序成功信息。
6、回到主菜单，输入4，回车
按提示插入一组
⑥ 学生成绩管理系统c
#include "stdio.h"
#include<conio.h>
#include<string.h>
#include<stdlib.h>
struct book{
char number[21];
char shuming[30];
int shuliang;
int jiage;
char zhuanye[20];
char zuozhe[26];
char chubanshe[20];
char beizhu[100];
struct book *next;
};
struct book *creat() /*创建链表*/
{
struct book *p,*head,*end;
head=end=p=(struct book *)malloc(sizeof(struct book));
printf("输入教材编号为0结束输入，每项信息都必须输入内容。\n");
do
{
printf("\n教材编号：");
gets(p->number);
if(strcmp(p->number,"0")==0){ end->next=NULL; return head;}
end=p;
printf("\n教材名称：");
gets(p->shuming);
printf("\n教材数量：");
scanf("%d",&p->shuliang);
printf("\n教材价格：");
scanf("%d",&p->jiage);
getchar();
printf("\n教材专业：");
gets(p->zhuanye);
printf("\n教材作者：");
gets(p->zuozhe);
printf("\n教材出版社：");
gets(p->chubanshe);
printf("\n备注:");
gets(p->beizhu);
p=(struct book *)malloc(sizeof(struct book));
end->next=p;
}while(1);
}
void save(struct book *head) /*保存链表*/
{FILE *fp;
struct book *p;
char filename[30];
int ch;
printf("请输入“文件名.后缀”：");
scanf("%s",filename);
if((fp=fopen(filename,"r"))!=NULL)
{
printf("\n该文件已存在，是否覆盖？1，是 2，否");
scanf("%d",&ch);
if(ch!=1)
return;
}
if((fp=fopen(filename,"w"))==NULL) { printf("\n文件保存失败");getchar();return;}
p=head;
do{
fprintf(fp,"\n%s",p->number);
fprintf(fp,"\n%s",p->shuming);;
fprintf(fp,"\n%d",p->shuliang);
fprintf(fp,"\n%d",p->jiage);
fprintf(fp,"\n%s",p->zhuanye);
fprintf(fp,"\n%s",p->zuozhe);
fprintf(fp,"\n%s",p->chubanshe);
fprintf(fp,"\n%s",p->beizhu);
p=p->next;
}while(p!=NULL);
fprintf(fp," over");
printf("\n成功保存");
getchar();
getchar();
fclose(fp);
}
void print(struct book *head) /*输出链表*/
{
struct book *p;
p=head;
if(p==NULL) { printf("未打开任何文件，无法显示"); getch();return;}
do{
printf("\n\n教材编号：%s",p->number);
printf("\n教材名称：%s",p->shuming);;
printf("\n数量：%d",p->shuliang);
printf("\n价格：%d",p->jiage);
printf("\n专业：%s",p->zhuanye);
printf("\n作者：%s",p->zuozhe);
printf("\n出版社：%s",p->chubanshe);
printf("\n备注：%s",p->beizhu);
p=p->next;
}while(p!=NULL);
}
struct book *openfile() /*打开文件*/
{struct book *p,*f,*head;
FILE *fp;
char filename[20];
printf("\n请输入路径，文件名，和后缀）：");
scanf("%s",filename);
if((fp=fopen(filename,"r"))==NULL){ printf("\n文件找不到，请检查是否有该文件和路径是否正确");getchar();return NULL;}
head=f=p=(struct book *)malloc(sizeof(struct book));
fscanf(fp,"%s%s%d%d%s%s%s%s",p->number,p->shuming,&p->shuliang,&p->jiage,p->zhuanye,p->zuozhe,p->chubanshe,p->beizhu);
while(!feof(fp))
{ p=(struct book *)malloc(sizeof(struct book));
f->next=p;
fscanf(fp,"%s%s%d%d%s%s%s%s",p->number,p->shuming,&p->shuliang,&p->jiage,p->zhuanye,p->zuozhe,p->chubanshe,p->beizhu);
if(strcmp(p->number,"over")==0){ f->next=NULL; printf("\n文件打开成功，可以显示此信息");getchar(); return head; }
f=p;
}
return head;
}
void namesort(struct book *head) /*按教材名称排序*/
{ struct book *p,*t,*f,*h;
char ch[20];
int i;
h=t=f=p=head;
if(head==NULL) {printf("未打开任何文件");getchar();return; };
f=p->next;
for(p=head;p->next!=NULL;p=p->next)
{
for(t=head,f=t->next;t->next!=NULL;f=f->next,t=t->next)
{
if(strcmp(t->shuming,f->shuming)>0)
{
strcpy(ch,t->number );
strcpy(t->number,f->number);
strcpy(f->number,ch);
strcpy(ch,t->shuming );
strcpy(t->shuming,f->shuming);
strcpy(f->shuming,ch);
i=t->shuliang ;
t->shuliang=f->shuliang;
f->shuliang=i;
i=t->jiage ;
t->jiage=f->jiage;
f->jiage=i;
strcpy(ch,t->zhuanye);
strcpy(t->zhuanye,f->zhuanye);
strcpy(f->zhuanye,ch);
strcpy(ch,t->zuozhe);
strcpy(t->zuozhe,f->zuozhe);
strcpy(f->zuozhe,ch);
strcpy(ch,t->chubanshe);
strcpy(t->chubanshe,f->chubanshe);
strcpy(f->chubanshe,ch);
strcpy(ch,t->beizhu);
strcpy(t->beizhu,f->beizhu);
strcpy(f->beizhu,ch);
}
}
}
print(h);
}
void chubanshesort(struct book *head) /*按出版社排序*/
{ struct book *p,*t,*f,*h;
char ch[20];
int i;
h=t=f=p=head;
if(head==NULL) {printf("未打开任何文件");getchar();return; }
f=p->next;
for(p=head;p->next!=NULL;p=p->next)
{
for(t=head,f=t->next;t->next!=NULL;f=f->next,t=t->next)
{
if(strcmp(t->chubanshe,f->chubanshe)>0)
{
strcpy(ch,t->number );
strcpy(t->number,f->number);
strcpy(f->number,ch);
strcpy(ch,t->shuming );
strcpy(t->shuming,f->shuming);
strcpy(f->shuming,ch);
i=t->shuliang ;
t->shuliang=f->shuliang;
f->shuliang=i;
i=t->jiage ;
t->jiage=f->jiage;
f->jiage=i;
strcpy(ch,t->zhuanye);
strcpy(t->zhuanye,f->zhuanye);
strcpy(f->zhuanye,ch);
strcpy(ch,t->zuozhe);
strcpy(t->zuozhe,f->zuozhe);
strcpy(f->zuozhe,ch);
strcpy(ch,t->chubanshe);
strcpy(t->chubanshe,f->chubanshe);
strcpy(f->chubanshe,ch);
strcpy(ch,t->beizhu);
strcpy(t->beizhu,f->beizhu);
strcpy(f->beizhu,ch);
}
}
}
print(h);
}
void shumingsearch(struct book *head) /*按教材名称查找*/
{ struct book *p;
char name[20];
int c;
if(head==NULL) {printf("未打开任何文件");getchar();return;}
printf("1，查找专业 2，查找教材名称：");
scanf("%d",&c);
getchar();
if(c==2)
printf("请输入要查找的教材名称：");
else printf("请输入要查找的专业：");
gets(name);
p=head;
do{ if(c==2)
if(strcmp(p->shuming,name)==0)
{
printf("教材编号：%s\n教材名称：%s\n数量：%d\n价格：%d\n专业：%s\n作者：%s\n出版社：%s\n备注：%s\n",p->number,p->shuming,p->shuliang,p->jiage,p->zhuanye,p->zuozhe,p->chubanshe,p->beizhu);
}
if(c==1)
if(strcmp(p->zhuanye,name)==0)
{
printf("教材编号：%s\n教材名称：%s\n数量：%d\n价格：%d\n专业：%s\n作者：%s\n出版社：%s\n备注：%s\n",p->number,p->shuming,p->shuliang,p->jiage,p->zhuanye,p->zuozhe,p->chubanshe,p->beizhu);
}
p=p->next;
}while(p!=NULL);
printf("查找完成");
return;
}
struct book *add(struct book *head) /*增加记录*/
{ struct book *p,*e,*f,*h;
if(head==NULL) {printf("未打开任何文件");getchar(); return NULL;}
h=f=e=head;
p=(struct book *)malloc(sizeof(struct book));
printf("\n教材编号：");
gets(p->number);
printf("\n教材名称：");
gets(p->shuming);
printf("\n数量：");
scanf("%d",&p->shuliang);
printf("\n价格：");
scanf("%d",&p->jiage);
getchar();
printf("\n专业：");
gets(p->zhuanye);
printf("\n作者：");
gets(p->zuozhe);
printf("\n出版社：");
gets(p->chubanshe);
printf("\n备注:");
gets(p->beizhu);
if(strcmp(f->number,p->number)>0) { p->next=f;h=p;printf("\n添加成功");return h;}
if(f->next==NULL) { f->next=p;p->next=NULL;printf("\n添加成功");return h;}
do{
if(f->next!=NULL)
if(strcmp(f->number,p->number)>0)
{
e->next=p;p->next=f;printf("\n添加成功");return h;
}
if(f->next==NULL)
{
f->next=p;
p->next=NULL;
printf("\n添加成功");
return h;
}
f=f->next;
e=e->next;
}while(1);
}
struct book *delet(struct book *head) /*删除记录*/
{ struct book *p,*e;
char num[20];
if(head==NULL) {printf("未打开任何文件");getchar();return NULL;}
printf("请输入要删除的教材编号：");
scanf("%s",num);
p=e=head;
if(strcmp(p->number,num)==0) { head=head->next; print(head);return head;}
else p=p->next;
do{
if(strcmp(p->number,num)==0)
{
if(p->next!=NULL)
e->next=p->next;
if(p->next==NULL) e->next=NULL;
print(head);
return head;
}
p=p->next;
e=e->next;
}while(p!=NULL);
printf("搜索完毕，未找到该记录");
return head;
}
struct book *change(struct book *head) /*修改记录*/
{ struct book *p;
char num[20];
if(head==NULL) {printf("未打开任何文件");getchar();return NULL;}
printf("请输入要修改的教材编号：");
scanf("%s",num);
getchar();
p=head;
do{
if(strcmp(p->number,num)==0)
{
printf("教材编号：%s\n教材名称：%s\n数量：%d\n价格：%d\n专业：%s\n作者：%s\n出版社：%s\n备注：%s\n",p->number,p->shuming,p->shuliang,p->jiage,p->zhuanye,p->zuozhe,p->chubanshe,p->beizhu);
printf("\n教材编号：");
gets(p->number);
printf("\n教材名称：");
gets(p->shuming);
printf("\n数量：");
scanf("%d",&p->shuliang);
printf("\n价格：");
scanf("%d",&p->jiage);
getchar();
printf("\n专业：");
gets(p->zhuanye);
printf("\n作者：");
gets(p->zuozhe);
printf("\n出版社：");
gets(p->chubanshe);
printf("\n备注:");
gets(p->beizhu);
printf("修改成功");
return head;
}
p=p->next;
}while(p!=NULL);
printf("未找到要修改的记录");
return head;
}
int mima()
{ FILE *fp;
char mima1[20],mima2[20];
if((fp=fopen("mima","r"))==NULL)
{ printf("尚未设置密码请输入：");
scanf("%s",mima1);
printf("请再次输入密码：");
scanf("%s",mima2);
if(strcmp(mima1,mima2)!=0) { printf("两次密码不一样");return 0;}
else {
fp=fopen("mima","w");
fprintf(fp,"%s",mima1);
printf("密码设置成功");
return 1;
}
}
printf("请输入初始化密码：");
scanf("%s",mima1);
fscanf(fp,"%s",mima2);
if(strcmp(mima1,mima2)==0)
{
printf("密码正确");
printf("请输入要删除的文件名：");
scanf("%s",mima1);
if(remove(mima1)==0)
{
printf("删除成功");
getchar();
return 1;
}
else {
printf("删除失败，请检查是否存在该文件或路径是否正确");
getchar();
return 0;
}
}
else {
printf("密码错误");
getchar();
return 0;
}
}
void main()
{
struct book *head=NULL;
char i;
printf(" 88888888888 \n");
printf(" d88888888888b \n");
printf(" d88888 88888b \n");
printf(" d88P 88b \n");
printf(" 888' `88b \n");
printf(" 88P Y88 \n");
printf(" 88 88\n");
printf(" 88 88\n");
printf(" 88 88\n");
printf(" 88 88\n");
printf(" 88 88\n");
printf(" 88 ,aa. ,aa. 88 \n");
printf(" 88 d88b d88b 88 \n");
printf(" ,=88 Y88P Y88P 88=, \n");
printf(" ,d88P' `' _aa_ `' `Y88b, \n");
printf(" 88P' (8888) `Y88 ad88888b \n");
printf(" 88 ~^^~ 88 d88Y Y8b\n");
printf(" Yb._ _.d8 d8Y 88\n");
printf(" d88888888ba888=,. .,=8888 d88 88 \n");
printf(" ★☆88P Y88~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~★☆\n");
printf(" ★☆ 88 88 ★☆\n");
printf(" ★☆88 88 欢迎使用本教材系统,按任意键进入系统 ★☆\n");
printf(" ★☆ 8b,___,d8 ★☆\n");
printf(" ★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆★☆\n");
getch();
system("cls");
do{
printf(" ☆★☆★☆★ 教材管理系统 ☆★☆★☆★\n");
printf("m--菜单 h--帮助");
printf("\n请输入命令:");
i=getch();
if(i=='h')
{ printf("\n1，录入教材信息的时候，每一个项目都必须输入相应的内容。\n2，修改，增加，删除，查找记录前必须先打开一个文件，修改完后必须记得保存教材信息。\n3,必须使用正确的路径打开文件，建议保存文件时候不用输入路径（此时是默认路径，即保存在程序目录下。）");
getch();
break;
}
if(i=='m')
break;
system("cls");
}while(i!='m'||i!='h');
system("cls");
do{
printf(" ☆★☆★☆★ 教材管理系统 ☆★☆★☆★\n");
printf("┌————-———┐\n");
printf("│1，录入教材信息│\n│2，显示教材信息│\n│3，打开一个记录│\n│4，编辑一个记录│\n│5，保存教材信息│\n│6，查找记录 │\n│s，初始化系统 │\n│e，退出系统 │\n");
printf("└———————-┘\n");
printf("\n请输入功能编号：");
i=getch();
system("cls");
switch(i)
{
case '1': head=creat();save(head);break;
case '2': print(head);break;
case '3': head=openfile();break;
case '4': system("cls");
printf("┌————-———┐\n");
printf("│1，增加一个记录│\n");
printf("│2，删除一个记录│\n");
printf("│3，修改一个记录│\n");
printf("└———————-┘\n");
i=getch();
switch(i)
{
case '1':
head=add(head);break;
case '2':
head=delet(head);break;
case '3': head=change(head);break;
default: break;
}
break;
case '5': save(head);break;
case '6': shumingsearch(head);break;
case 's': mima();break;
case 'e': exit(0);
default :break;
}
system("cls");
}while(1);
}
我想这个程序包含了你那个成绩管理系统的全部要求，但我这个是教材管理系统我想改一下就可以了，具体如何改就要看楼主的天赋咯，呵呵。参考一下吧
⑦ 学生成绩管理系统c语言代码
这个成绩统计系统，不是1个小时就能写完的。要占用回答者数小时时间，不多给点金币？或是其它的？
⑧ 学生成绩管理系统(C语言）
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<windows.h>
#define NUM_SUBJECT 4
typedef struct zl
{
char no[5]; /*学号*/
char name[6]; /*姓名*/
int score[NUM_SUBJECT]; /*各门学科成绩*/
float total; /*总分*/
float average; /*平均分*/
int order; /*名次*/
}STUDENT;
int REC_NUM=0; /*学生记录数*/
char*subject[]={"数学","电脑","物理","电工学"};
char*menu[]={"**************MENU***************",
"1. Enter new record",
"2. Display record",
"3. Search record",
"4. Modify record",
"5. Delete a record to list",
"6. Add a record to list",
"7. Sort to make new file",
"8. Save the file",
"9. Load the file",
"10. Quit"};
STUDENT records[10];
void newRec();
void showTable();
void showTable2(Iint);
void display();
void searchRec();
void modifyRec();
void deleteRec();
void addRec();
void orderRec();
void sortRec();
void saveRec();
void loadRec();
void Rec(STUDENT*,STUDENT*);
void quit();
int menu_select();
int findRec(char*,int,int);
void main()
{
system("cls");
for(;;)
{
switch(menu_select())
{
case 1: newRec();break;
case 2: display();break;
case 3: searchRec();break;
case 4: modifyRec();break;
case 5: deleteRec();break;
case 6: addRec();break;
case 7: sortRec();break;
case 8: saveRec();break;
case 9: loadRec();break;
case 10: quit();
}
}
}
int menu_select()
{
char s[3];
int c,i;
for(i=0;i<11;i++)
{
printf("%s",menu[i]);
}
window(1,1,80,25);
do
{
printf(" Enter you choice(1-10):");
scanf("%s",s);
c=atoi(s);
}while(c<0||c>11);
return c;
}
void showTable1()
{
system("cls");
printf("*****************STUDENT INFORMATION****************");
printf("????D?D?D?D?D?D?D?D?D?D???\n");
printf("|Rec | No | Name | Computer | Physics | English | total | Average | Order\n");
printf("?¨¤?¨¤?¨¤?¨¤?¨¤?¨¤?¨¤?¨¨\n");
}
void showTable2(int n)
{
if(n==0)n=1;
if(REC_NUM==0)n=-1;
printf("??????????????????\n");
}
void quit()
{
char str[5];
printf("Save records?(Y/N)");
scanf("%s",str);
if(str[0]=='Y'||str[0]=='y')
saveRec();
exit(0);
}
void newRec()
{
int i, j, sum;
system("cls");
printf("Please input the REC_NUM:");
scanf("%d",&REC_NUM);
for(i=0;i<REC_NUM;i++)
{
system("cls");
sum=0;
for(j=0;j<NUM_SUBJECT;j++);
{
scanf("%d",&records[i].score[j]);
sum=sum+records[i].score[j];
}
records[i].total=sum;
records[i].average=records[i].total/NUM_SUBJECT;
records[i].order=0;
}
}
void display()
{
int i=0;
showTable1();
for(i=0;i<REC_NUM;i++)
{
printf("|%2d |%4s |6s?%4d | %4d | %4d | %5.1f | %5.1f | %2d \n",i+1,records[i].no,records[i].name,records[i].score[0],records[i].score[1],records[i].score[2],records[i].score[3],records[i].total,records[i].average,records[i].order);
}
showTable2(i);
printf("Press any key to return!");
getch();
}
void saveRec()
{
FILE*fp1,*fp2;
if((fp1=fopen("d:\\cjt\\tc\\lianxiti\\keshe\\keshe.dat","wb"))==NULL)
{
printf("Cannot open this file!");
exit(1);
}
if((fp2=fopen("d:\\cjt\\tc\\lianxiti\\keshe\\keshe.dat","wb"))==NULL)
{
printf("Cannot open this file!");
exit(1);
}
printf("\nSaving file......\n");
fwrite(&REC_NUM,sizeof(REC_NUM),1,fp2);
fwrite(records,sizeof(STUDENT),REC_NUM,fp1);
fclose(fp1);fclose(fp2);
printf("n\Save success!!\n");delay(1000);
printf("\nPress any key to return!");
getch();
}
void loadRec()
{
FILE*fp1,*fp2;
if((fp1=fopen("d:\\cjt\\tc\\lianxiti\\keshe\\keshe.dat","rb"))==NULL)
{
printf("Cannot open this file!");
exit(1);
}
if((fp2=fopen("d:\\cjt\\tc\\lianxiti\\keshe\\keshe.dat","rb"))==NULL)
{
printf("Cannot open this file!");
exit(1);
}
system("cls");
printf("\nLoading file.....\n");
fread(&REC_NUM,sizeof(REC_NUM),1,fp2);
fread(records,sizeof(STUDENT),REC_NUM,fp1);
fclose(fp1);fclose(fp2);
delay(2000);
printf("\nYou have success read date from file!!!\n");
printf("\press any key to return!");
getch();
}
void searchRec()
{
char str[20];
int i;
system("cls");
printf("Please input the number you want to get:");
scanf("%s",str);
i=findRec(str,1,0);
if(i!=-1)
{
printf("|%2d |%4s | 6s| %4d | %4d | %4d | %4d| %5.1f | %5.1f | %2d \n",i+1,records[i].no,records[i].name,records[i].score[0],records[i].score[1],records[i].score[2],records[i].score[3],records[i].total,records[i].average,records[i].order);
showTable2(0);
}
else printf("Not find!\n");
printf("Press any key to return!");
getch();
}
void deleteRec()
{
int i, j;
char str[20];
system("cls");
printf("Please input the number you want to delete:");
scanf("%S",str);
i=findRec(str,1,0);
for(j=i;j<REC_NUM;j++)
records[j]=records[j+1];
REC_NUM--;
saveRec();
}
void Rec(STUDENT*src,STUDENT*dest)
{
int i;
strcpy(dest->no,src->no);
strcpy(dest->name,src->name);
for(i=0;i<NUM_SUBJECT;i++)
dest->score[i]=src->score[i];
dest->total=src->total;
dest->average=src->average;
dest->order=src->order;
}
void orderRec()
{
int i;
records[0].order=1;
for(i=1;i<REC_NUM;i++)
if(records[i].total==records[i-1].total)
records[i].order=records[i-1].order;
else
records[i].order=i+1;
}
void sortRec()
{
int i,j,flag;
STUDENT t;
system("cls");
printf("\nsorting file\n");
for(i=0;i<REC_NUM;i++)
{
flag=0;
for(j=REC_NUM-1;j>i;j--)
if(records[j].total>records[j-1].total)
{
Rec(&records[j],&t);
Rec(&records[j-1],&records[j]);
Rec(&t,&records[j-1]);
flag=1;
}
if(!flag) break;
}
orderRec();
delay(2000);
printf("\nsorting success\n");
saveRec();
}
int findRec(char *target,int tarType,int from)
{
int i;
for(i=from;i<REC_NUM;i++)
{
if((tarType==1&&strcmp(target,records[i].no)==0)
||tarType==2&&strcmp(target,records[i].name)==0)
return(i);
}
return(-1);
}
void modifyRec()
{
int i,j,sum;
char no[20],str[8];
system("cls");
printf("Please input the number you want to modify:");
scanf("%s",no);
i=findRec(no,1,0);
showTable1();
printf("| %2d | %4s | 6s |%4d |%4d | %4d | %4d | %5.1f | %5.1f|%2d |\n",i+1,records[i].no,records[i].name,records[i].score[0],records[i].score[1],records[i].score[2],records[i].score[3],records[i].total,records[i].average,records[i].order);
showTable2(0);
printf("Do you wang to modify this student(Y/N):");
scanf("%s",str);
if(str[0]=='y'||str[0]=='Y')
{
printf("enter number:");scanf("%s",records[i].no);
printf("enter name:");scanf("%s",records[i].name);
sum=0;
for(j=0;j<NUM_SUBJECT;j++)
{
printf("%s:",subject[j]);
scanf("%d",&records[i].score[j]);
sum=sum+records[i].score[j];
}
records[i].total=sum;
records[i].average=records[i].total/NUM_SUBJECT;
records[i].order=0;
}
printf("Press any key to return!");
getch();
}
void addRec()
{
int i,j,sum=0;
char no[20],str[8];
for(;;)
{
system("cls");
printf("Please input the number you want to add:");
scanf("%s",str);
i=findRec(str,1,0);
if(i==-1)break;
else printf("This number is exist!\n");
getch();
}
strcpy(records[REC_NUM].no,str);
printf("enter name:");scanf("%s",records[REC_NUM].name);
for(j=0;j<NUM_SUBJECT;j++)
{
printf("%s:",subject[j]);
scanf("%d",&records[REC_NUM].score[j]);
sum=sum+records[REC_NUM].score[j];
}
records[REC_NUM].total=sum;
records[REC_NUM].average=records[REC_NUM].total/NUM_SUBJECT;
records[REC_NUM].order=0;
REC_NUM++;
saveRec();
}
⑨ 用C语言设计一个学生成绩管理系统
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#defineMAX1000
/*定义学生成绩信息结构*/
struct stu
{
char id[8];
char name[8];
(9)学生成绩管理系统c扩展阅读：
short：修饰int，短整型数据，可省略被修饰的int。（K&R时期引入）
long：修饰int，长整型数据，可省略被修饰的int。（K&R时期引入）
long long：修饰int，超长整型数据，可省略被修饰的int。（C99标准新增）
signed：修饰整型数据，有符号数据类型。（C89标准新增）
unsigned：修饰整型数据，无符号数据类型。（K&R时期引入）
restrict:用于限定和约束指针，并表明指针是访问一个数据对象的唯一且初始的方式。（C99标准新增）
复杂类型关键字
struct：结构体声明。（K&R时期引入）
union：联合体声明。（K&R时期引入）
enum：枚举声明。（C89标准新增）
typedef：声明类型别名。（K&R时期引入）
sizeof：得到特定类型或特定类型变量的大小。（K&R时期引入）
inline:内联函数用于取代宏定义，会在任何调用它的地方展开。（C99标准新增）
⑩ 学生成绩管理系统 c语言
两年前做的，现在都不会C语言了。
下面的代码应该是对的。没有注释，但应该能看的懂，起名字也很不规范。只有信息输入、和查询，还有平均成绩。不求得分，只是拿出来共享一下，提供个参考。
#include<stdio.h>
#include<string.h>
#define pl 64
void fine(int size[][6],char xh[][5],char name[][9])
{
int i,a,b;
char d[5];
for(;;)
{
printf("请输入要查找的学号或姓名：");
scanf("%s",d);
for(i=0;i<pl;i++)
if(strcmp(d,xh[i])==0||strcmp(d,name[i])==0)
{
printf("学号：%s\t",xh[i]);
printf("姓名:%s\n",name[i]);
printf("成绩：");
for(a=0;a<5;a++)
{
printf("%d ",size[i][a]);
}
printf("\n平均成绩：%d\n\n",size[i][5]);
}
}
}
void main()
{
int size[pl][6],a,i;
char b, name[pl][9], xh[pl][5];
for(i=0;i<pl;i++)
{
printf("学号：");
scanf("%s",xh[i]);
printf("姓名:");
scanf("%s",name[i]);
printf("成绩:");
size[i][5]=0;
for(a=0;a<5;a++)
{
scanf("%d",&size[i][a]);
size[i][5]+=size[i][a];
}
size[i][5]/=5;
}
for(i=0;i<pl;i++)
{
printf("学号：%s\t",xh[i]);
printf("姓名:%s\n",name[i]);
printf("成绩：");
for(a=0;a<5;a++)
{
printf("%d ",size[i][a]);
}
printf("\n平均成绩：%d\n",size[i][5]);
}
fflush(stdin);
printf("是否要查找：y or n：\n");
scanf("%c",&b);
if(b=='y'||b=='Y')
fine(size,xh,name);
}