学生成绩管理系统v20c语言
㈠ 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();
}
㈡ 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;
}
㈢ 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();
}
}
㈣ 学生成绩管理系统 C语言编程
//用C++编的,基本能运行,可能有些冗余,你可以自己改一下
#include<iostream>
#include<fstream>
#include<string>
#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
#include<iomanip>
using namespace std;
class student
{
public:
char *GET_name(){return name;}
char *GET_sex(){return sex;}
int GET_num(){return number;}
int GET_mat(){return Math;}
int GET_eng(){return English;}
protected:
int number,Math,English;
char name[20],sex[5];
};
class student_computer:public student
{
public:
void assign();
int GET_dat() {return datastruct;}
int GET_ele() {return electric;}
int GET_c() {return C;}
float GET_total() {return English+Math+C+datastruct+electric;}
void display();
protected:
int C,datastruct,electric;
float total;
};
typedef struct point_pc
{
student_computer *node;
point_pc *next;
}PT_pc;
void student_computer::display()
{
cout<<"学号："<<setw(2)<<number<<" 姓名："<<setw(4)<<name<<" 性别："<<setw(2)<<sex<<"\n 数学："<<setw(3)<<Math<<" 英语："<<setw(3)<<English<<" C语言："<<setw(3)<<C<<" 数据结构："<<setw(3)<<datastruct<<" 电子电路："<<setw(3)<<electric<<" 总分："<<setw(4)<<GET_total()<<endl;
}
void student_computer::assign()
{
cout<<"输入姓名：";
getchar();
if(strcmp(gets(name),"#")!=0)
{
cout<<"学号：";
cin>>number;
cout<<"性别：";
getchar();
gets(sex);
cout<<"英语：";
cin>>English;
cout<<"数学：";
cin>>Math;
cout<<"C语言：";
cin>>C;
cout<<"数据结构：";
cin>>datastruct;
cout<<"电子电路：";
cin>>electric;
}
}
PT_pc *build_pc()
{int n=0;
student_computer *ppc=NULL;
PT_pc *head,*pm1,*pm2;
ppc=(student_computer *)malloc(sizeof(student_computer));
ppc->assign();
head=pm1=pm2=(PT_pc *)malloc(sizeof(PT_pc));
pm1->node=ppc;
cout<<"输入#为结束！"<<endl;
while(strcmp(ppc->GET_name(),"#"))
{if(n++!=0)pm2->next=pm1;
pm2=pm1;
ppc=(student_computer *)malloc(sizeof(student_computer));
ppc->assign();
pm1=(PT_pc*)malloc(sizeof(PT_pc));
pm1->node=ppc;
}
pm2->next=NULL;
if(strcmp(head->node->GET_name(),"#")==0)
head=NULL;
return head;
}
PT_pc *rank_pc(PT_pc *head)
{
PT_pc *p,*q,*temp;
temp=(PT_pc *)malloc(sizeof(PT_pc));
p=head;
for(;p->next!=NULL;p=p->next)
for(q=p->next;q!=NULL;q=q->next)
{
if((p->node->GET_total())<(q->node->GET_total()))
{
temp->node=p->node;
p->node=q->node;
q->node=temp->node;
}
}
return head;
}
PT_pc *add_pc(PT_pc *head)
{
PT_pc *pi;
pi=(PT_pc *)malloc(sizeof(PT_pc));
student_computer *p;
p=(student_computer *)malloc(sizeof(student_computer));
p->assign();
pi->node=p;
pi->next=head;
head=pi;
return head;
}
PT_pc *del_pc(PT_pc *head)
{
PT_pc *p_move=head;
int number;
cout<<"输入删除者学号：";
cin>>number;
if(head==NULL) {cout<<"without message to delete or rework!"<<endl; return head;}
if(head->node->GET_num()==number) {head=NULL;return head;}
while(p_move->next!=NULL)
{
if((p_move->next)->node->GET_num()==number) break;
p_move=p_move->next;
}
if(p_move->next==NULL) {cout<<"\n\n没有此信息！\n\n";return head;}
p_move->next=(p_move->next)->next;
return head;
}
PT_pc *rework_pc(PT_pc *head)
{
PT_pc *p_move;
student_computer *pi;
pi=(student_computer*)malloc(sizeof(student_computer));
int number;
cout<<"输入要修改者学号："<<endl;
cin>>number;
p_move=head;
while(p_move!=NULL)
{
if(p_move->node->GET_num()==number)
{pi->assign(); break;}
else p_move=p_move->next;
}
if(p_move==NULL) {cout<<"没有此信息！"<<endl;}
else p_move->node=pi;
return head;
}
void find_pc(PT_pc *head)
{int number;
PT_pc *p_move;
cout<<"输入学号：";
cin>>number;
p_move=head;
while(p_move!=NULL)
{if(p_move->node->GET_num()==number)
{p_move->node->display();
break;
}
p_move=p_move->next;
}
if(p_move==NULL) cout<<"没有此信息！"<<endl;
}
void save_pc(PT_pc *head)
{
PT_pc *p;
p=head;
ofstream outfile("student_computer.txt",ios::binary);
if(!outfile)
{cerr<<"open file fail!"<<endl;
exit(1);
}
while(p!=NULL)
{outfile.write((char*)(p->node),sizeof(student_computer));
p=p->next;
}
outfile.close();
cout<<"保存成功！"<<endl;
}
PT_pc *read_pc()
{
int n=0, i=0;
student_computer *ppc;
PT_pc *head,*p_move1,*p_move2;
ppc=(student_computer *)malloc(sizeof(student_computer));
head=p_move1=p_move2=(PT_pc *)malloc(sizeof(PT_pc));
ifstream infile("student_computer.txt",ios::binary);
if(!infile)
{
cerr<<"打开文件失败!"<<endl;
getchar();
}
while(!infile.eof())
{if((i++)!=0) p_move2->next=p_move1;
p_move2=p_move1;
infile.read((char*)ppc,sizeof(student_computer));
p_move1->node=ppc;
ppc=(student_computer *)malloc(sizeof(student_computer));
p_move1=(PT_pc*)malloc(sizeof(PT_pc));
}
infile.close();
p_move1=NULL;
ppc=NULL;
p_move2->next=NULL;
{
i=0;
p_move1=p_move2=head;
while(p_move1->next!=NULL)
{if((i++)!=0) {p_move2->next=p_move1;p_move2=p_move1;}
p_move1=p_move1->next;
}
p_move2->next=NULL;
}
return head;
}
void display_pc(PT_pc *head)
{PT_pc *p=head;
int i=0;
while(p!=NULL)
{cout<<++i<<" ";
p->node->display();
p=p->next;
}
}
void main()
{char c='0',t='0';
PT_pc *headpc;
system("cls");
ifstream infile("student_computer.txt",ios::binary);
if(!infile)
{cerr<<"请建立新信息!"<<endl;
headpc=build_pc();
}
else headpc=read_pc();
while(t!='8')
{
while(t<'1'||t>'8')
{cout<<"请选择菜单:\n1.打印所有。\n2.添加部分数据.\n3.删除部分数据.\n4.修改数据.\n5.查找数据.\n6.成绩排名.\n7.建立新数据.\n8.退出.\n\n 选择:";
cin>>t;
}
switch(t)
{
case '1': system("cls"); display_pc(headpc); break;
case '2': system("cls"); headpc=add_pc(headpc); display_pc(headpc); break;
case '3': system("cls"); headpc=del_pc(headpc); display_pc(headpc); break;
case '4': system("cls"); headpc=rework_pc(headpc); display_pc(headpc); break;
case '5': system("cls"); find_pc(headpc); break;
case '6': system("cls"); headpc=rank_pc(headpc); display_pc(headpc); break;
case '7': system("cls"); headpc=build_pc(); break;
}
if(t!='8') t='0';
}
while(c!='y'&&c!='n')
{cout<<"是否保存修改后的信息(y or n):"<<endl;
cin>>c;
}
if(c=='y') save_pc(headpc);
}
㈤ 学生成绩管理系统 C语言
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "malloc.h"
typedef char ElemType;
#define OK 1
#define ERROR 0
#define OVER -1
typedef struct node
{
int number;
char name[20];
int chinese,math,english;
struct node *next;
} LinkList;
LinkList *InitList()
{
LinkList *H;
H=(LinkList *)malloc(sizeof(LinkList));
H->next=NULL;
return(H);
}
int Length_list(LinkList *H)
{
LinkList *p;
int j=0;
p=H;
while(p->next!=NULL)
{ p=p->next;
j++;
}
return j;
}
void CreateList(LinkList *H,int n)
{
int i;
LinkList *s,*last;
char ch;
last=H;
for(i=1;i<=n;i++)
{ s=(LinkList *)malloc(sizeof(LinkList));
printf("\n请输入第%d个学生的学号:",i);
scanf("%d",&s->number);
printf("\n请输入第%d个学生的姓名:",i);
scanf("%s",&s->name);
printf("\n请输入第%d个学生的语文、数学和英语成绩:",i);
scanf("%d%d%d",&s->chinese,&s->math,&s->english);
s->next=NULL;
last->next=s;
last=s;
}
}
LinkList *Locate(LinkList *H,int num)
{
LinkList *p;
p=H->next;
while(p!=NULL&&p->number!=num)
p=p->next;
return p;
}
LinkList *GetList(LinkList *H,int i)
{
LinkList *p;
int j=0;
p=H;
while(p->next!=NULL &&j<i)
{
p=p->next;
j++;
}
if(j==i)
return p;
else
return NULL;
}
int InsList(LinkList *p,LinkList x)
{
LinkList *s;
s=(LinkList *)malloc(sizeof(LinkList));
s->number=x.number;
strcpy(s->name,x.name);
s->chinese=x.chinese;
s->math=x.math;
s->english=x.english;
s->next=p->next;
p->next=s;
return OK;
}
int Ins_List(LinkList *H,int i,LinkList x)
{
LinkList *p;
p=GetList(H,i-1);
if(p!=NULL)
{
InsList(p,x);
return OK;
}
else
return ERROR;
}
int DelList(LinkList *p,LinkList *x)
{
LinkList *s;
s=p->next;
x->number=s->number;
strcpy(x->name,s->name);
x->chinese=s->chinese;
x->math=s->math;
x->english=s->english;
p->next=s->next;
free(s);
return OK;
}
int Del_List(LinkList *H,int i,LinkList *x)
{
LinkList *p;
p=GetList(H,i-1);
if(p!=NULL&&p->next!=NULL)
{
DelList(p,x);
return OK;
}
else
return ERROR;
}
out()
{
printf("\n*****************************************");
printf("\n请输入序号(0-4)选择要进行的操作:");
printf("\n0-------退出");
printf("\n1-------建立一个学生信息表");
printf("\n2-------插入一个学生信息");
printf("\n3-------删除一个学生信息");
printf("\n4-------查找一个学生是否在该学生信息表中");
printf("\n*****************************************\n");
}
void DisLinkList(LinkList *H)
{
LinkList *p;
printf("\n所有学生的信息如下:");
printf("\n 学号 姓名 语文 数学 英语\n");
p=H->next;
while(p!=NULL)
{
printf("%2d%10s%9d%9d%9d\n",p->number,p->name,p->chinese,p->math,p->english);
p=p->next;
}
}
void main()
{
LinkList *H,*p,*q,x;
int i,n,menux,flag,num;
//clrscr();
out();
H=InitList();
scanf("%d",&menux);
do{switch(menux)
{
case 0: exit(0); break;
case 1:
printf("\n请输入要生成学生信息表的元素各数:");
scanf("%d",&n);
CreateList(H,n);
printf("建立的学生信息表为:\n");
DisLinkList(H);
break;
case 2:
printf("\n请输入要插入的学生位置:");
scanf("%d",&i);
printf("\n请输入要插入的学生信息:");
printf("\n请输入学生的学号:");
scanf("%d",&x.number);
printf("\n请输入学生的姓名:");
scanf("%s",&x.name);
printf("\n请输入学生的语文 数学和英语成绩:");
scanf("%d%d%d",&x.chinese,&x.math,&x.english);
flag=Ins_List(H,i,x);
if(flag)
{
printf("\n插入后的学生信息表为:");
DisLinkList(H);
}
break;
case 3:
printf("请输入要删除的学生的位置:");
scanf("%d",&i);
flag=Del_List(H,i,&x);
if(flag)
{
printf("\n删除第%d个学生后，表中信息为:",i);
DisLinkList(H);
}
break;
case 4:
printf("\n请输入查找的学生学号:\n");
scanf("%d",&num);
if((q=Locate(H,num))!=NULL)
{
printf("\n在学生信息表中存在着学号为%d的学生!",num);
printf("\n学号 姓名 语文 数学 英语\n");
printf("%2d%10s%9d%9d%9d",q->number,q->name,q->chinese,q->math,q->english);
}
else
printf("\n在学生信息表中不存在着学号为%d的学生!",num);
break;
default:
printf("\n输入选项错误，请重新输入(0-4)!");
}
out();
scanf("%d",&menux);
}while(1);
}
㈥ 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
㈦ 学生成绩管理系统(c语言程序设计)
其实很简单的啦~你上论坛去问、很多高手的。
㈧ 学生成绩管理系统（数组版）c语言
//我简单写,请借鉴:#include "stdafx.h"#include "stdio.h"#include "string.h"#include "math.h"#include "time.h"#include "string.h" #include<iostream>using namespace std; struct Student //定义学生结构{ char id[20]; //id char name[11]; //姓名 char res[4]; //成绩 int end; //存储时显示换行, 可去掉 Student(){end = 0x0a0d;} //回车,换行 }list[100]; //100个账号, 测试 void main(){ srand((unsigned)time(0)); //种子 char buf[256]; //缓存 //初始化学生100名 int i; for(i=0;i<100;++i) { strcpy(list[i].id ,itoa(i,buf,10)); strcpy(list[i].name ,"某人"); strcpy(list[i].res, itoa(rand()%100,buf, 10)); } //保存数据 FILE * pf = fopen("data.txt", "wb"); for(i=0;i<100;++i) { fwrite(&list[i], sizeof(Student), 1, pf); } fclose(pf); //读出数据 Student list_1[100]; //新数组 pf = fopen("data.txt", "rb"); for(i=0;i<100;++i) { fread( &list_1[i], sizeof(Student), 1, pf); } //显示 list_1 测试 for(i=0;i<100;++i) { cout<<list_1[i].id<<" "<<list_1[i].name <<" "<<list_1[i].res<<endl; } }
㈨ 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？
㈩ c语言学生成绩管理系统
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
int shoudsave=0; /* */
struct student
{
char num[10];/* 学号 */
char name[20];
char sex[4];
int cgrade;
int mgrade;
int egrade;
int totle;
int ave;
char neartime[10];/* 最近更新时间 */
};
typedef struct node
{
struct student data;
struct node *next;
}Node,*Link;
void menu()
{
printf("********************************************************************************");
printf("\t1登记学生资料\t\t\t\t\t2删除学生资料\n");
printf("\t3查询学生资料\t\t\t\t\t4修改学生资料\n");
printf("\t5保存学生资料\t\t\t\t\t0退出系统\n");
printf("********************************************************************************\n");
}
void printstart()
{
printf("-----------------------------------------------------------------------\n");
}
void Wrong()
{
printf("\n=====>提示:输入错误!\n");
}
void Nofind()
{
printf("\n=====>提示:没有找到该学生!\n");
}
void printc() /* 本函数用于输出中文 */
{
printf(" 学号\t 姓名 性别 英语成绩 数学成绩 C语言成绩 总分 平均分\n");
}
void printe(Node *p)/* 本函数用于输出英文 */
{
printf("%-12s%s\t%s\t%d\t%d\t%d\t %d\t %d\n",p->data.num,p->data.name,p->data.sex,p->data.egrade,p->data.mgrade,p->data.cgrade,p->data.totle,p->data.ave);
}
Node* Locate(Link l,char findmess[],char nameornum[]) /* 该函数用于定位连表中符合要求的接点，并返回该指针 */
{
Node *r;
if(strcmp(nameornum,"num")==0) /* 按学号查询 */
{
r=l->next;
while(r!=NULL)
{
if(strcmp(r->data.num,findmess)==0)
return r;
r=r->next;
}
}
else if(strcmp(nameornum,"name")==0) /* 按姓名查询 */
{
r=l->next;
while(r!=NULL)
{
if(strcmp(r->data.name,findmess)==0)
return r;
r=r->next;
}
}
return 0;
}
void Add(Link l) /* 增加学生 */
{
Node *p,*r,*s;
char num[10];
r=l;
s=l->next;
while(r->next!=NULL)
r=r->next; /* 将指针置于最末尾 */
while(1)
{
printf("请你输入学号(以'0'返回上一级菜单:)");
scanf("%s",num);
if(strcmp(num,"0")==0)
break;
while(s)
{
if(strcmp(s->data.num,num)==0)
{
printf("=====>提示:学号为'%s'的学生已经存在,若要修改请你选择'4 修改'!\n",num);
printstart();
printc();
printe(s);
printstart();
printf("\n");
return;
}
s=s->next;
}
p=(Node *)malloc(sizeof(Node));
strcpy(p->data.num,num);
printf("请你输入姓名:");
scanf("%s",p->data.name);
getchar();
printf("请你输入性别:");
scanf("%s",p->data.sex);
getchar();
printf("请你输入c语言成绩:");
scanf("%d",&p->data.cgrade);
getchar();
printf("请你输入数学成绩:");
scanf("%d",&p->data.mgrade);
getchar();
printf("请你输入英语成绩:");
scanf("%d",&p->data.egrade);
getchar();
p->data.totle=p->data.egrade+p->data.cgrade+p->data.mgrade;
p->data.ave=p->data.totle / 3;
/* 信息输入已经完成 */
p->next=NULL;
r->next=p;
r=p;
shoudsave=1;
}
}
void Qur(Link l) /* 查询学生 */
{
int sel;
char findmess[20];
Node *p;
if(!l->next)
{
printf("\n=====>提示:没有资料可以查询!\n");
return;
}
printf("\n=====>1按学号查找\n=====>2按姓名查找\n");
scanf("%d",&sel);
if(sel==1)/* 学号 */
{
printf("请你输入要查找的学号:");
scanf("%s",findmess);
p=Locate(l,findmess,"num");
if(p)
{
printf("\t\t\t\t查找结果\n");
printstart();
printc();
printe(p);
printstart();
}
else
Nofind();
}
else if(sel==2) /* 姓名 */
{
printf("请你输入要查找的姓名:");
scanf("%s",findmess);
p=Locate(l,findmess,"name");
if(p)
{
printf("\t\t\t\t查找结果\n");
printstart();
printc();
printe(p);
printstart();
}
else
Nofind();
}
else
Wrong();
}
void Del(Link l) /* 删除 */
{
int sel;
Node *p,*r;
char findmess[20];
if(!l->next)
{
printf("\n=====>提示:没有资料可以删除!\n");
return;
}
printf("\n=====>1按学号删除\n=====>2按姓名删除\n");
scanf("%d",&sel);
if(sel==1)
{
printf("请你输入要删除的学号:");
scanf("%s",findmess);
p=Locate(l,findmess,"num");
if(p)
{
r=l;
while(r->next!=p)
r=r->next;
r->next=p->next;
free(p);
printf("\n=====>提示:该学生已经成功删除!\n");
shoudsave=1;
}
else
Nofind();
}
else if(sel==2)
{
printf("请你输入要删除的姓名:");
scanf("%s",findmess);
p=Locate(l,findmess,"name");
if(p)
{
r=l;
while(r->next!=p)
r=r->next;
r->next=p->next;
free(p);
printf("\n=====>提示:该学生已经成功删除!\n");
shoudsave=1;
}
else
Nofind();
}
else
Wrong();
}
void Modify(Link l)
{
Node *p;
char findmess[20];
if(!l->next)
{
printf("\n=====>提示:没有资料可以修改!\n");
return;
}
printf("请你输入要修改的学生学号:");
scanf("%s",findmess);
p=Locate(l,findmess,"num");
if(p)
{
printf("请你输入新学号(原来是%s):",p->data.num);
scanf("%s",p->data.num);
printf("请你输入新姓名(原来是%s):",p->data.name);
scanf("%s",p->data.name);
getchar();
printf("请你输入新性别(原来是%s):",p->data.sex);
scanf("%s",p->data.sex);
printf("请你输入新的c语言成绩(原来是%d分):",p->data.cgrade);
scanf("%d",&p->data.cgrade);
getchar();
printf("请你输入新的数学成绩(原来是%d分):",p->data.mgrade);
scanf("%d",&p->data.mgrade);
getchar();
printf("请你输入新的英语成绩(原来是%d分):",p->data.egrade);
scanf("%d",&p->data.egrade);
p->data.totle=p->data.egrade+p->data.cgrade+p->data.mgrade;
p->data.ave=p->data.totle/3;
printf("\n=====>提示:资料修改成功!\n");
shoudsave=1;
}
else
Nofind();
}
void Disp(Link l)
{
int count=0;
Node *p;
p=l->next;
if(!p)
{
printf("\n=====>提示:没有资料可以显示!\n");
return;
}
printf("\t\t\t\t显示结果\n");
printstart();
printc();
printf("\n");
while(p)
{
printe(p);
p=p->next;
}
printstart();
printf("\n");
}
void Tongji(Link l)
{
Node *pm,*pe,*pc,*pt,*pa; /* 用于指向分数最高的接点 */
Node *r=l->next;
if(!r)
{
printf("\n=====>提示:没有资料可以统计!\n");
return ;
}
pm=pe=pc=pt=pa=r;
while(r!=NULL)
{
if(r->data.cgrade>=pc->data.cgrade)
pc=r;
if(r->data.mgrade>=pm->data.mgrade)
pm=r;
if(r->data.egrade>=pe->data.egrade)
pe=r;
if(r->data.totle>=pt->data.totle)
pt=r;
if(r->data.ave>=pa->data.ave)
pa=r;
r=r->next;
}
printf("------------------------------统计结果--------------------------------\n");
printf("总分最高者:\t%s %d分\n",pt->data.name,pt->data.totle);
printf("平均分最高者:\t%s %d分\n",pa->data.name,pa->data.ave);
printf("英语最高者:\t%s %d分\n",pe->data.name,pe->data.egrade);
printf("数学最高者:\t%s %d分\n",pm->data.name,pm->data.mgrade);
printf("c语言最高者:\t%s %d分\n",pc->data.name,pc->data.cgrade);
printstart();
}
void Sort(Link l)
{
Link ll;
Node *p,*rr,*s;
ll=(Link)malloc(sizeof(Node)); /* 用于做新的连表 */
ll->next=NULL;
if(l->next==NULL)
{
printf("\n=====>提示:没有资料可以排序!\n");
return ;
}
p=l->next;
while(p)
{
s=(Node*)malloc(sizeof(Node)); /* 新建接点用于保存信息 */
s->data=p->data;
s->next=NULL;
rr=ll;
while(rr->next!=NULL && rr->next->data.totle>=p->data.totle)
rr=rr->next;
if(rr->next==NULL)
rr->next=s;
else
{
s->next=rr->next;
rr->next=s;
}
p=p->next;
}
free(l);
l->next=ll->next;
printf("\n=====>提示:排序已经完成!\n");
}
void Save(Link l)
{
FILE* fp;
Node *p;
int flag=1,count=0;
fp=fopen("c:\\student","wb");
if(fp==NULL)
{
printf("\n=====>提示:重新打开文件时发生错误!\n");
exit(1);
}
p=l->next;
while(p)
{
if(fwrite(p,sizeof(Node),1,fp)==1)
{
p=p->next;
count++;
}
else
{
flag=0;
break;
}
}
if(flag)
{
printf("\n=====>提示:文件保存成功.(有%d条记录已经保存.)\n",count);
shoudsave=0;
}
fclose(fp);
}
void main()
{
Link l;/* 连表 */
FILE *fp; /* 文件指针 */
int sel;
char ch;
char jian;
int count=0;
Node *p,*r;
printf("\t\t\t\t学生成绩管理系统\n\t\t\t\t-------西京学院本科部机制0502 彭琛(41号)\n");
l=(Node*)malloc(sizeof(Node));
l->next=NULL;
r=l;
fp=fopen("C:\\student","rb");
if(fp==NULL)
{
printf("\n=====>提示:文件还不存在，是否创建？(y/n)\n");
scanf("%c",&jian);
if(jian=='y'||jian=='Y')
fp=fopen("C:\\student","wb");
else
exit(0);
}
printf("\n=====>提示:文件已经打开,正在导入记录......\n");
while(!feof(fp))
{
p=(Node*)malloc(sizeof(Node));
if(fread(p,sizeof(Node),1,fp)) /* 将文件的内容放入接点中 */
{
p->next=NULL;
r->next=p;
r=p; /* 将该接点挂入连中 */
count++;
}
}
fclose(fp); /* 关闭文件 */
printf("\n=====>提示:记录导入完毕,共导入%d条记录.\n",count);
while(1)
{
menu();
printf("请你选择操作:");
scanf("%d",&sel);
if(sel==0)
{
if(shoudsave==1)
{ getchar();
printf("\n=====>提示:资料已经改动,是否将改动保存到文件中(y/n)?\n");
scanf("%c",&ch);
if(ch=='y'||ch=='Y')
Save(l);
}
printf("\n=====>提示:你已经退出系统,再见!\n");
break;
}
switch(sel)
{
case 1:Add(l);break; /* 增加学生 */
case 2:Del(l);break;/* 删除学生 */
case 3:Qur(l);break;/* 查询学生 */
case 4:Modify(l);break;/* 修改学生 */
case 5:Save(l);break;/* 保存学生 */
case 9:printf("\t\t\t==========帮助信息==========\n");break;
default: Wrong();getchar();break;
}
}
}
/* */