學生成績管理系統v20c語言
㈠ 學生成績管理系統(C語言）
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<windows.h>
#define NUM_SUBJECT 4
typedef struct zl
{
char no[5]; /*學號*/
char name[6]; /*姓名*/
int score[NUM_SUBJECT]; /*各門學科成績*/
float total; /*總分*/
float average; /*平均分*/
int order; /*名次*/
}STUDENT;
int REC_NUM=0; /*學生記錄數*/
char*subject[]={"數學","電腦","物理","電工學"};
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 學生成績管理系統c語言
用C語言程序編寫一個學生成績管理系統，界面用菜單進行設計。菜單功能可用函數實現。
# include <iostream>
# include <fstream>
# include <string.h>
#include <conio.h>//用getch();
using namespace std;
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌Student類﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
class Student
{
public:
char name[20];
char Id[20];
int Cnum; //C++課程得分
int Mnum; //匯編課程得分
int Enum; //嵌入式操作系統課程得分
int sum; //總分
Student * Next;
void Input()
{
cout<<"\t\t請輸入學生的姓名："; cin>>name;
cout<<"\t\t請輸入學生的學號："; cin>>Id;
cout<<"\t\t請輸入C++課程的成績："; cin>>Cnum;
cout<<"\t\t請輸入匯編課程的成績："; cin>>Mnum;
cout<<"\t\t請輸入嵌入式操作系統課程的成績："; cin>>Enum;
sum=Cnum+Mnum+Enum;
}
void ReadFile(istream & in)
{
in>>name>>Id>>Cnum>>Mnum>>Enum>>sum;
}
void Show()
{
cout<<"姓名:"<<name<<endl<<"學號:"<<Id<<endl<<"C++:"<<Cnum<<endl
<<"匯編:"<<Mnum<<endl<<"嵌入式操作系統："<<Enum<<endl<<"總成績:"<<sum<<endl<<endl<<endl;
}
};
//﹌﹌﹌﹌﹌﹌﹌﹌﹌Studentmassage類﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
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<<"輸入任意字元！繼續……";
getch();
}
void AddItem()
{
End->Input();
End->Next=new Student;
End=End->Next;
cout<<"添加成功!"<<endl;
cout<<"輸入任意字元！繼續……";
getch();
}
private:
Student * Head,* End;
ifstream in;
ofstream out;
Student *FindItem(char * name)
{
for(Student * p=Head;p->Next!=End;p=p->Next)//匹配成功則返回上一個指針，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)//匹配成功則返回上一個指針，不成功就返回空
if(!strcmp(p->Next->Id,Id))return p;
return NULL;
}
};
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌構造函數﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
Studentmassage::Studentmassage()
{
Head=new Student;
Head->Next=new Student;
End=Head->Next;
in.open("sort.txt");
if(!in)
cout<<"這是一個新系統，無學生信息。請先輸入。"<<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讀取學生信息成功!"<<endl;
}
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌析構函數﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
Studentmassage::~Studentmassage()
{
Save();
for(Student * temp;Head->Next!=End;)
{
temp=Head->Next;
Head->Next=Head->Next->Next;
delete temp;
}
delete Head,End;
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌菜單﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::ShowMenu()
{
cout<<"********************************************************************************"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓〓 ☆ 學 生 成 績 管 理 系 統 ☆ 〓〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓★★★★★ ★★★★★★★ ★★★★★〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 1.增加學生成績 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 2.顯示學生成績 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 3.排序統計成績 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 4.查找學生成績 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 5.刪除學生成績 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 6.修改學生信息 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"〓〓〓〓〓〓〓〓〓★ ☆ 0.安全退出系統 ☆ ★〓〓〓〓〓〓〓〓〓"<<endl;
cout<<"\n\t\t\n\t\t請選擇：";
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌查找函數﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::Find()
{
char name[20] ,Id[10];
int x;
Student * p=NULL;
cout<<"\n\t\t*********************************\n";
cout<<"\t\t※ 1.按學生的姓名查找\n\t\t※ 2.按學生學號查找";
cout<<"\n\t\t*********************************\n請選擇：";
cin>>x;
switch(x)
{
case 1:{cout<<"\t\t請輸入要查找的學生的姓名：";cin>>name;
if(p=FindItem(name))
{
p->Next->Show();
cout<<"輸入任意字元！繼續……";
getch();
}
else
{
cout<<"\t\t沒有找到該姓名的學生！"<<'\n'<<endl;
cout<<"輸入任意字元！繼續……";
getch();
}
}break;
case 2:
{
cout<<"\t\t請輸入要查找的學生的學號：";cin>>Id;
if(p=FindID(Id))
{
p->Next->Show();
cout<<"輸入任意字元！繼續……";
getch();
}
else
{
cout<<"\t\t沒有找到該學好的學生！"<<'\n'<<endl;
cout<<"輸入任意字元！繼續……";
getch();
}
}break;
}
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌修改信息﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::ModifyItem() //修改信息
{
char name[20];
Student * p=NULL;
cout<<"\t\t請輸入要修改的人的姓名:";cin>>name;
if(p=FindItem(name))
{
cout<<"\t\t已找到學生的信息，請輸入新的信息!"<<endl;
p->Next->Input();
cout<<"修改成功！"<<endl;
cout<<"輸入任意字元！繼續……";
getch();
}
else
{
cout<<"\t\t沒有找到!"<<endl;
cout<<"輸入任意字元！繼續……";
getch();
}
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌刪除信息﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::RemoveItem() // 刪除信息
{
char name[20];
Student * p=NULL,*temp=NULL;
cout<<"\t\t請輸入要刪除的學生的姓名:"<<endl;cin>>name;
if(p=FindItem(name))
{
temp=p->Next;
p->Next=p->Next->Next;
delete temp;
cout<<"\t\t刪除成功!"<<endl;
cout<<"輸入任意字元！繼續……";
getch();
}
else
{
cout<<"\t\t沒有找到!"<<endl;
cout<<"輸入任意字元！繼續……";
getch();
}
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::Swap(Student *p1, Student *p2)//交換兩個combox變數的數據域
{
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()//統計當前鏈表的記錄總數，返回一個整數
{
if(! Head)
return 0;
int n=0;
for(Student * p=Head->Next;p!=End;p=p->Next)
{
n++;
}
return n;
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
void Studentmassage::Sort()//對當前鏈表進行排序
{
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;
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌保存函數﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
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();
}
//﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌主函數﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌﹌
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◎★★★★【 歡迎進入學生成績管理系統 】★★★★◎"<<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<<"按任意鍵開始……";
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 學生成績管理系統C語言代碼
#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請輸入密碼:\n\t\t\n\t\t");
scanf("%s",s);
if(!strcmp(s,password))
{
printf("\n\t\t恭喜你進入學生成績管理系統\n");
menu();
}
else
{
printf("\t\t 密碼錯誤\n\n");
main();
}
}
㈣ 學生成績管理系統 C語言編程
//用C++編的,基本能運行,可能有些冗餘,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<<"學號："<<setw(2)<<number<<" 姓名："<<setw(4)<<name<<" 性別："<<setw(2)<<sex<<"\n 數學："<<setw(3)<<Math<<" 英語："<<setw(3)<<English<<" C語言："<<setw(3)<<C<<" 數據結構："<<setw(3)<<datastruct<<" 電子電路："<<setw(3)<<electric<<" 總分："<<setw(4)<<GET_total()<<endl;
}
void student_computer::assign()
{
cout<<"輸入姓名：";
getchar();
if(strcmp(gets(name),"#")!=0)
{
cout<<"學號：";
cin>>number;
cout<<"性別：";
getchar();
gets(sex);
cout<<"英語：";
cin>>English;
cout<<"數學：";
cin>>Math;
cout<<"C語言：";
cin>>C;
cout<<"數據結構：";
cin>>datastruct;
cout<<"電子電路：";
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<<"輸入#為結束！"<<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<<"輸入刪除者學號：";
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沒有此信息！\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<<"輸入要修改者學號："<<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<<"沒有此信息！"<<endl;}
else p_move->node=pi;
return head;
}
void find_pc(PT_pc *head)
{int number;
PT_pc *p_move;
cout<<"輸入學號：";
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<<"沒有此信息！"<<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<<"打開文件失敗!"<<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<<"請建立新信息!"<<endl;
headpc=build_pc();
}
else headpc=read_pc();
while(t!='8')
{
while(t<'1'||t>'8')
{cout<<"請選擇菜單:\n1.列印所有。\n2.添加部分數據.\n3.刪除部分數據.\n4.修改數據.\n5.查找數據.\n6.成績排名.\n7.建立新數據.\n8.退出.\n\n 選擇:";
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<<"是否保存修改後的信息(y or n):"<<endl;
cin>>c;
}
if(c=='y') save_pc(headpc);
}
㈤ 學生成績管理系統 C語言
#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請輸入第%d個學生的學號:",i);
scanf("%d",&s->number);
printf("\n請輸入第%d個學生的姓名:",i);
scanf("%s",&s->name);
printf("\n請輸入第%d個學生的語文、數學和英語成績:",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請輸入序號(0-4)選擇要進行的操作:");
printf("\n0-------退出");
printf("\n1-------建立一個學生信息表");
printf("\n2-------插入一個學生信息");
printf("\n3-------刪除一個學生信息");
printf("\n4-------查找一個學生是否在該學生信息表中");
printf("\n*****************************************\n");
}
void DisLinkList(LinkList *H)
{
LinkList *p;
printf("\n所有學生的信息如下:");
printf("\n 學號 姓名 語文 數學 英語\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請輸入要生成學生信息表的元素各數:");
scanf("%d",&n);
CreateList(H,n);
printf("建立的學生信息表為:\n");
DisLinkList(H);
break;
case 2:
printf("\n請輸入要插入的學生位置:");
scanf("%d",&i);
printf("\n請輸入要插入的學生信息:");
printf("\n請輸入學生的學號:");
scanf("%d",&x.number);
printf("\n請輸入學生的姓名:");
scanf("%s",&x.name);
printf("\n請輸入學生的語文 數學和英語成績:");
scanf("%d%d%d",&x.chinese,&x.math,&x.english);
flag=Ins_List(H,i,x);
if(flag)
{
printf("\n插入後的學生信息表為:");
DisLinkList(H);
}
break;
case 3:
printf("請輸入要刪除的學生的位置:");
scanf("%d",&i);
flag=Del_List(H,i,&x);
if(flag)
{
printf("\n刪除第%d個學生後，表中信息為:",i);
DisLinkList(H);
}
break;
case 4:
printf("\n請輸入查找的學生學號:\n");
scanf("%d",&num);
if((q=Locate(H,num))!=NULL)
{
printf("\n在學生信息表中存在著學號為%d的學生!",num);
printf("\n學號 姓名 語文 數學 英語\n");
printf("%2d%10s%9d%9d%9d",q->number,q->name,q->chinese,q->math,q->english);
}
else
printf("\n在學生信息表中不存在著學號為%d的學生!",num);
break;
default:
printf("\n輸入選項錯誤，請重新輸入(0-4)!");
}
out();
scanf("%d",&menux);
}while(1);
}
㈥ 學生成績管理系統C語言編程
||#include<stdio.h> /*引用庫函數*/
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
typedef struct /*定義結構體數組*/
{
char num[10]; /*學號*/
char name[20]; /*姓名*/
int score; /*成績*/
}Student;
Student stu[80]; /*結構體數組變數*/
int menu_select() /*菜單函數*/
{
char c;
do{
system("cls"); /*運行前清屏*/
printf("\t\t****Students' Grade Management System****\n"); /*菜單選擇*/
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(); /*讀入選擇*/
}while(c<'0'||c>'9');
return(c-'0'); /*返回選擇*/
}
int Input(Student stud[],int n) /*輸入若干條記錄*/
{int i=0;
char sign,x[10]; /*x[10]為清除多餘的數據所用*/
while(sign!='n'&&sign!='N') /*判斷*/
{ printf("\t\t\tstudent's num:"); /*交互輸入*/
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); /*清除多餘的輸入*/
printf("\t\t\tany more records?(Y/N)");
scanf("\t\t\t%c",&sign); /*輸入判斷*/
i++;
}
return(n+i);
}
void Display(Student stud[],int n) /*顯示所有記錄*/
{
int i;
printf("\t\t\t-----------------------------------\n"); /*格式頭*/
printf("\t\t\tnumber name score\n");
printf("\t\t\t-----------------------------------\n");
for(i=1;i<n+1;i++) /*循環輸入*/
{
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) /*每十個暫停*/
{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) /*按學號排序*/
{ 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) /*插入一條記錄*/
{char x[10]; /*清除多餘輸入所用*/
printf("\t\t\tstudent's num:"); /*互動式輸入*/
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); /*調用排序函數*/
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，刪除一條記錄*/
{ char s[20];
int i=0,j;
printf("\t\t\ttell me his(her) name:"); /*互動式問尋*/
scanf("%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判斷*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*返回失敗信息*/
return(n);
}
for(j=i;j<n-1;j++) /*刪除操作*/
{
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) /*查找並顯示一個記錄*/
{ char s[20];
int i=0;
printf("\t\t\tinput his(her) name:"); /*互動式輸入*/
scanf("\t\t\t%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判斷*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*輸入失敗信息*/
return;
}
printf("\t\t\this(her) number:%s\n",stud[i].num); /*輸出該學生信息*/
printf("\t\t\this(her) score:%d\n",stud[i].score);
}
void Statistic(Student stud[],int n) /*新增功能，輸出統計信息*/
{ int i,j=0,k=0,sum=0;
float aver; /*成績平均值*/
for(i=0;i<n;i++) /*循環輸入判斷*/
{
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); /*總共記錄數*/
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) /*從文件中讀入數據*/
{ int i=0,num;
FILE *fp; /*定義文件指針*/
char filename[20]; /*定義文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename); /*輸入文件名*/
if((fp=fopen(filename,"rb"))==NULL) /*打開文件*/
{ printf("\t\t\tcann't open the file\n"); /*打開失敗信息*/
printf("\t\t\t");
system("pause");
return(n);
}
fscanf(fp,"%d",&num); /*讀入總記錄量*/
while(i<num) /*循環讀入數據*/
{
fscanf(fp,"%s%s%d",stud[n+i].num,stud[n+i].name,&stud[n+i].score);
i++;
}
n+=num;
fclose(fp); /*關閉文件*/
printf("\t\t\tSuccessed!\n");
printf("\t\t\t");
system("pause");
return(n);
}
void WritetoText(Student stud[],int n) /*將所有記錄寫入文件*/
{
int i=0;
FILE *fp; /*定義文件指針*/
char filename[20]; /*定義文件名*/
printf("\t\t\tWrite Records to a Text File\n"); /*輸入文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename);
if((fp=fopen(filename,"w"))==NULL) /*打開文件*/
{
printf("\t\t\tcann't open the file\n");
system("pause");
return;
}
fprintf(fp,"%d\n",n); /*循環寫入數據*/
while(i<n)
{
fprintf(fp,"%-16s%-15s%d\n",stud[i].num,stud[i].name,stud[i].score);
i++;
}
fclose(fp); /*關閉文件*/
printf("Successed!\n"); /*返回成功信息*/
}
void main() /*主函數*/
{
int n=0;
for(;;)
{
switch(menu_select()) /*選擇判斷*/
{
case 1:
printf("\t\t\tInput Records\n"); /*輸入若干條記錄*/
n=Input(stu,n);
break;
case 2:
printf("\t\t\tDisplay All Records\n"); /*顯示所有記錄*/
Display(stu,n);
break;
case 3:
printf("\t\t\tSort\n");
Sort_by_num(stu,n); /*按學號排序*/
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); /*插入一條記錄*/
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，刪除一條記錄*/
printf("\t\t\t");
system("pause");
break;
case 6:
printf("\t\t\tQuery\n");
Query_a_record(stu,n); /*查找並顯示一個記錄*/
printf("\t\t\t");
system("pause");
break;
case 7:
printf("\t\t\tStatistic\n");
Statistic(stu,n); /*新增功能，輸出統計信息*/
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，輸出統計信息*/
break;
case 9:
printf("\t\t\tWrite to a Text file\n");
WritetoText(stu,n); /*循環寫入數據*/
printf("\t\t\t");
system("pause");
break;
case 0:
printf("\t\t\tHave a Good Luck,Bye-bye!\n"); /*結束程序*/
printf("\t\t\t");
system("pause");
exit(0);
}
}
}
四、函數調用關系圖
註：「→」代表調用
Input函數
列印鏈表記錄
Display函數
輸入若干條記錄
menu_select()函數
選擇菜單
Sort_by_num函數
顯示所有記錄
Delete_a_record函數
按姓名查找，刪除一條記錄
Query_a_record查找並顯示一條記錄
Statistic函數
輸出統計信息 （新增）
AddfromText函數
從正文中添加數據到結構體數組中
Main函數
Insert_a_record插入一條記錄
WritetoText函數 將所有數據寫入文件中
退出程序
Reverse(head)函數
按學號排序
五、設計測試流程
1、進入界面
2、輸入選項1，回車；
按提示輸入數據：
3、回到主菜單；
輸入選項7，回車；
輸入文件名：data.txt，回車；
出現成功提示，則讀入文件操作成功。
4、回到主菜單，輸入2，回車
每10個暫停顯示數據
5、回到主菜單，輸入3，回車
出現排序成功信息。
6、回到主菜單，輸入4，回車
按提示插入一組數據
7、回到主菜單，輸入5，回車
按提示輸入姓名，刪除數據
出現刪除成功的信息
8、回到主菜單，輸入6，回車
輸入姓名進行查詢
9、回到主菜單，輸入7，回車
出現統計信息
10、回到主菜單，輸入9，回車
輸入result.txt，回車
出現成功寫入文件的信息
11、回到主菜單，輸入0，回車退出系統
回答者：kingkey001 - 試用期 一級 7-14 22:38
修改答復： kingkey001，您要修改的答復如下: 積分規則 關閉
C語言課程設計報告-------學生成績簡單管理程序
一、系統菜單的主要功能
（1）輸入若干條記錄
（2）顯示所有記錄
（3）按學號排序
（4）插入一條記錄
（5）按姓名查找，刪除一條記錄
（6）查找並顯示一條記錄
（7）輸出統計信息 （新增）
（8）從正文中添加數據到結構體數組中
（9）將所有數據寫入文件中
（0）退出程序
二、題目分析
該題主要考察學生對結構體，指針，文件的操作，以及C語言演算法的掌握,所以完成此道題目要求較強的設計能力，尤其是要有一種大局觀的意識。如何調程序也非常重要，通過這個程序可以學習到以前調試短程序沒有的的經驗。
菜單中的每一個選項都對應一個子程序，子程序的演算法幾乎囊獲了所有C語言學過的技巧，下面就各個子程序中的功能進行說明：
功能1和4的演算法相似，輸入一條記錄到結構體中去，其中有一部很關鍵，就是通過gets將所有的多餘的字元，回車讀去，否則就會出錯。
功能2是顯示所有的記錄，通過循環輸出，格式也比較重要。
功能3為按學號排序，因為學號定義成了字元數組的形式，因此在運用冒泡法進行排序的時候，要用到strcmp,strcpy等函數。
功能5為按姓名刪除記錄，先輸入姓名，再一一比較，如果沒有則返回失敗信息，如果找到就將此記錄都向前移一位，返回n-1。
功能6的演算法在5中就已經體現了，輸入姓名，一一比較。
功能7為新增的功能，因為考慮到原來給出的函數中竟然沒有對學生成績的統計功能，因此新增此功能，可以得出所有的記錄個數，最高、最低、平均分，並輸出相關的學生信息等。
功能8和9是對文件的操作，提前准備好數據。
三、程序正文部分
#include<stdio.h> /*引用庫函數*/
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
typedef struct /*定義結構體數組*/
{
char num[10]; /*學號*/
char name[20]; /*姓名*/
int score; /*成績*/
}Student;
Student stu[80]; /*結構體數組變數*/
int menu_select() /*菜單函數*/
{
char c;
do{
system("cls"); /*運行前清屏*/
printf("\t\t****Students' Grade Management System****\n"); /*菜單選擇*/
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(); /*讀入選擇*/
}while(c<'0'||c>'9');
return(c-'0'); /*返回選擇*/
}
int Input(Student stud[],int n) /*輸入若干條記錄*/
{int i=0;
char sign,x[10]; /*x[10]為清除多餘的數據所用*/
while(sign!='n'&&sign!='N') /*判斷*/
{ printf("\t\t\tstudent's num:"); /*交互輸入*/
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); /*清除多餘的輸入*/
printf("\t\t\tany more records?(Y/N)");
scanf("\t\t\t%c",&sign); /*輸入判斷*/
i++;
}
return(n+i);
}
void Display(Student stud[],int n) /*顯示所有記錄*/
{
int i;
printf("\t\t\t-----------------------------------\n"); /*格式頭*/
printf("\t\t\tnumber name score\n");
printf("\t\t\t-----------------------------------\n");
for(i=1;i<n+1;i++) /*循環輸入*/
{
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) /*每十個暫停*/
{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) /*按學號排序*/
{ 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) /*插入一條記錄*/
{char x[10]; /*清除多餘輸入所用*/
printf("\t\t\tstudent's num:"); /*互動式輸入*/
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); /*調用排序函數*/
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，刪除一條記錄*/
{ char s[20];
int i=0,j;
printf("\t\t\ttell me his(her) name:"); /*互動式問尋*/
scanf("%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判斷*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*返回失敗信息*/
return(n);
}
for(j=i;j<n-1;j++) /*刪除操作*/
{
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) /*查找並顯示一個記錄*/
{ char s[20];
int i=0;
printf("\t\t\tinput his(her) name:"); /*互動式輸入*/
scanf("\t\t\t%s",s);
while(strcmp(stud[i].name,s)!=0&&i<n) i++; /*查找判斷*/
if(i==n)
{ printf("\t\t\tnot find!\n"); /*輸入失敗信息*/
return;
}
printf("\t\t\this(her) number:%s\n",stud[i].num); /*輸出該學生信息*/
printf("\t\t\this(her) score:%d\n",stud[i].score);
}
void Statistic(Student stud[],int n) /*新增功能，輸出統計信息*/
{ int i,j=0,k=0,sum=0;
float aver; /*成績平均值*/
for(i=0;i<n;i++) /*循環輸入判斷*/
{
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); /*總共記錄數*/
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) /*從文件中讀入數據*/
{ int i=0,num;
FILE *fp; /*定義文件指針*/
char filename[20]; /*定義文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename); /*輸入文件名*/
if((fp=fopen(filename,"rb"))==NULL) /*打開文件*/
{ printf("\t\t\tcann't open the file\n"); /*打開失敗信息*/
printf("\t\t\t");
system("pause");
return(n);
}
fscanf(fp,"%d",&num); /*讀入總記錄量*/
while(i<num) /*循環讀入數據*/
{
fscanf(fp,"%s%s%d",stud[n+i].num,stud[n+i].name,&stud[n+i].score);
i++;
}
n+=num;
fclose(fp); /*關閉文件*/
printf("\t\t\tSuccessed!\n");
printf("\t\t\t");
system("pause");
return(n);
}
void WritetoText(Student stud[],int n) /*將所有記錄寫入文件*/
{
int i=0;
FILE *fp; /*定義文件指針*/
char filename[20]; /*定義文件名*/
printf("\t\t\tWrite Records to a Text File\n"); /*輸入文件名*/
printf("\t\t\tInput the filename:");
scanf("\t\t\t%s",filename);
if((fp=fopen(filename,"w"))==NULL) /*打開文件*/
{
printf("\t\t\tcann't open the file\n");
system("pause");
return;
}
fprintf(fp,"%d\n",n); /*循環寫入數據*/
while(i<n)
{
fprintf(fp,"%-16s%-15s%d\n",stud[i].num,stud[i].name,stud[i].score);
i++;
}
fclose(fp); /*關閉文件*/
printf("Successed!\n"); /*返回成功信息*/
}
void main() /*主函數*/
{
int n=0;
for(;;)
{
switch(menu_select()) /*選擇判斷*/
{
case 1:
printf("\t\t\tInput Records\n"); /*輸入若干條記錄*/
n=Input(stu,n);
break;
case 2:
printf("\t\t\tDisplay All Records\n"); /*顯示所有記錄*/
Display(stu,n);
break;
case 3:
printf("\t\t\tSort\n");
Sort_by_num(stu,n); /*按學號排序*/
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); /*插入一條記錄*/
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，刪除一條記錄*/
printf("\t\t\t");
system("pause");
break;
case 6:
printf("\t\t\tQuery\n");
Query_a_record(stu,n); /*查找並顯示一個記錄*/
printf("\t\t\t");
system("pause");
break;
case 7:
printf("\t\t\tStatistic\n");
Statistic(stu,n); /*新增功能，輸出統計信息*/
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，輸出統計信息*/
break;
case 9:
printf("\t\t\tWrite to a Text file\n");
WritetoText(stu,n); /*循環寫入數據*/
printf("\t\t\t");
system("pause");
break;
case 0:
printf("\t\t\tHave a Good Luck,Bye-bye!\n"); /*結束程序*/
printf("\t\t\t");
system("pause");
exit(0);
}
}
}
四、函數調用關系圖
註：「→」代表調用
Input函數
列印鏈表記錄
Display函數
輸入若干條記錄
menu_select()函數
選擇菜單
Sort_by_num函數
顯示所有記錄
Delete_a_record函數
按姓名查找，刪除一條記錄
Query_a_record查找並顯示一條記錄
Statistic函數
輸出統計信息 （新增）
AddfromText函數
從正文中添加數據到結構體數組中
Main函數
Insert_a_record插入一條記錄
WritetoText函數 將所有數據寫入文件中
退出程序
Reverse(head)函數
按學號排序
五、設計測試流程
1、進入界面
2、輸入選項1，回車；
按提示輸入數據：
3、回到主菜單；
輸入選項7，回車；
輸入文件名：data.txt，回車；
出現成功提示，則讀入文件操作成功。
4、回到主菜單，輸入2，回車
每10個暫停顯示數據
5、回到主菜單，輸入3，回車
出現排序成功信息。
6、回到主菜單，輸入4，回車
按提示插入一組
㈦ 學生成績管理系統(c語言程序設計)
其實很簡單的啦~你上論壇去問、很多高手的。
㈧ 學生成績管理系統（數組版）c語言
//我簡單寫,請借鑒:#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 //定義學生結構{ char id[20]; //id char name[11]; //姓名 char res[4]; //成績 int end; //存儲時顯示換行, 可去掉 Student(){end = 0x0a0d;} //回車,換行 }list[100]; //100個賬號, 測試 void main(){ srand((unsigned)time(0)); //種子 char buf[256]; //緩存 //初始化學生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)); } //保存數據 FILE * pf = fopen("data.txt", "wb"); for(i=0;i<100;++i) { fwrite(&list[i], sizeof(Student), 1, pf); } fclose(pf); //讀出數據 Student list_1[100]; //新數組 pf = fopen("data.txt", "rb"); for(i=0;i<100;++i) { fread( &list_1[i], sizeof(Student), 1, pf); } //顯示 list_1 測試 for(i=0;i<100;++i) { cout<<list_1[i].id<<" "<<list_1[i].name <<" "<<list_1[i].res<<endl; } }
㈨ 學生成績管理系統c語言代碼
這個成績統計系統，不是1個小時就能寫完的。要佔用回答者數小時時間，不多給點金幣？或是其它的？
㈩ c語言學生成績管理系統
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
int shoudsave=0; /* */
struct student
{
char num[10];/* 學號 */
char name[20];
char sex[4];
int cgrade;
int mgrade;
int egrade;
int totle;
int ave;
char neartime[10];/* 最近更新時間 */
};
typedef struct node
{
struct student data;
struct node *next;
}Node,*Link;
void menu()
{
printf("********************************************************************************");
printf("\t1登記學生資料\t\t\t\t\t2刪除學生資料\n");
printf("\t3查詢學生資料\t\t\t\t\t4修改學生資料\n");
printf("\t5保存學生資料\t\t\t\t\t0退出系統\n");
printf("********************************************************************************\n");
}
void printstart()
{
printf("-----------------------------------------------------------------------\n");
}
void Wrong()
{
printf("\n=====>提示:輸入錯誤!\n");
}
void Nofind()
{
printf("\n=====>提示:沒有找到該學生!\n");
}
void printc() /* 本函數用於輸出中文 */
{
printf(" 學號\t 姓名 性別 英語成績 數學成績 C語言成績 總分 平均分\n");
}
void printe(Node *p)/* 本函數用於輸出英文 */
{
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[]) /* 該函數用於定位連表中符合要求的接點，並返回該指針 */
{
Node *r;
if(strcmp(nameornum,"num")==0) /* 按學號查詢 */
{
r=l->next;
while(r!=NULL)
{
if(strcmp(r->data.num,findmess)==0)
return r;
r=r->next;
}
}
else if(strcmp(nameornum,"name")==0) /* 按姓名查詢 */
{
r=l->next;
while(r!=NULL)
{
if(strcmp(r->data.name,findmess)==0)
return r;
r=r->next;
}
}
return 0;
}
void Add(Link l) /* 增加學生 */
{
Node *p,*r,*s;
char num[10];
r=l;
s=l->next;
while(r->next!=NULL)
r=r->next; /* 將指針置於最末尾 */
while(1)
{
printf("請你輸入學號(以'0'返回上一級菜單:)");
scanf("%s",num);
if(strcmp(num,"0")==0)
break;
while(s)
{
if(strcmp(s->data.num,num)==0)
{
printf("=====>提示:學號為'%s'的學生已經存在,若要修改請你選擇'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("請你輸入姓名:");
scanf("%s",p->data.name);
getchar();
printf("請你輸入性別:");
scanf("%s",p->data.sex);
getchar();
printf("請你輸入c語言成績:");
scanf("%d",&p->data.cgrade);
getchar();
printf("請你輸入數學成績:");
scanf("%d",&p->data.mgrade);
getchar();
printf("請你輸入英語成績:");
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;
/* 信息輸入已經完成 */
p->next=NULL;
r->next=p;
r=p;
shoudsave=1;
}
}
void Qur(Link l) /* 查詢學生 */
{
int sel;
char findmess[20];
Node *p;
if(!l->next)
{
printf("\n=====>提示:沒有資料可以查詢!\n");
return;
}
printf("\n=====>1按學號查找\n=====>2按姓名查找\n");
scanf("%d",&sel);
if(sel==1)/* 學號 */
{
printf("請你輸入要查找的學號:");
scanf("%s",findmess);
p=Locate(l,findmess,"num");
if(p)
{
printf("\t\t\t\t查找結果\n");
printstart();
printc();
printe(p);
printstart();
}
else
Nofind();
}
else if(sel==2) /* 姓名 */
{
printf("請你輸入要查找的姓名:");
scanf("%s",findmess);
p=Locate(l,findmess,"name");
if(p)
{
printf("\t\t\t\t查找結果\n");
printstart();
printc();
printe(p);
printstart();
}
else
Nofind();
}
else
Wrong();
}
void Del(Link l) /* 刪除 */
{
int sel;
Node *p,*r;
char findmess[20];
if(!l->next)
{
printf("\n=====>提示:沒有資料可以刪除!\n");
return;
}
printf("\n=====>1按學號刪除\n=====>2按姓名刪除\n");
scanf("%d",&sel);
if(sel==1)
{
printf("請你輸入要刪除的學號:");
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:該學生已經成功刪除!\n");
shoudsave=1;
}
else
Nofind();
}
else if(sel==2)
{
printf("請你輸入要刪除的姓名:");
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:該學生已經成功刪除!\n");
shoudsave=1;
}
else
Nofind();
}
else
Wrong();
}
void Modify(Link l)
{
Node *p;
char findmess[20];
if(!l->next)
{
printf("\n=====>提示:沒有資料可以修改!\n");
return;
}
printf("請你輸入要修改的學生學號:");
scanf("%s",findmess);
p=Locate(l,findmess,"num");
if(p)
{
printf("請你輸入新學號(原來是%s):",p->data.num);
scanf("%s",p->data.num);
printf("請你輸入新姓名(原來是%s):",p->data.name);
scanf("%s",p->data.name);
getchar();
printf("請你輸入新性別(原來是%s):",p->data.sex);
scanf("%s",p->data.sex);
printf("請你輸入新的c語言成績(原來是%d分):",p->data.cgrade);
scanf("%d",&p->data.cgrade);
getchar();
printf("請你輸入新的數學成績(原來是%d分):",p->data.mgrade);
scanf("%d",&p->data.mgrade);
getchar();
printf("請你輸入新的英語成績(原來是%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:資料修改成功!\n");
shoudsave=1;
}
else
Nofind();
}
void Disp(Link l)
{
int count=0;
Node *p;
p=l->next;
if(!p)
{
printf("\n=====>提示:沒有資料可以顯示!\n");
return;
}
printf("\t\t\t\t顯示結果\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; /* 用於指向分數最高的接點 */
Node *r=l->next;
if(!r)
{
printf("\n=====>提示:沒有資料可以統計!\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("------------------------------統計結果--------------------------------\n");
printf("總分最高者:\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("英語最高者:\t%s %d分\n",pe->data.name,pe->data.egrade);
printf("數學最高者:\t%s %d分\n",pm->data.name,pm->data.mgrade);
printf("c語言最高者:\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)); /* 用於做新的連表 */
ll->next=NULL;
if(l->next==NULL)
{
printf("\n=====>提示:沒有資料可以排序!\n");
return ;
}
p=l->next;
while(p)
{
s=(Node*)malloc(sizeof(Node)); /* 新建接點用於保存信息 */
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:排序已經完成!\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:重新打開文件時發生錯誤!\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條記錄已經保存.)\n",count);
shoudsave=0;
}
fclose(fp);
}
void main()
{
Link l;/* 連表 */
FILE *fp; /* 文件指針 */
int sel;
char ch;
char jian;
int count=0;
Node *p,*r;
printf("\t\t\t\t學生成績管理系統\n\t\t\t\t-------西京學院本科部機制0502 彭琛(41號)\n");
l=(Node*)malloc(sizeof(Node));
l->next=NULL;
r=l;
fp=fopen("C:\\student","rb");
if(fp==NULL)
{
printf("\n=====>提示:文件還不存在，是否創建？(y/n)\n");
scanf("%c",&jian);
if(jian=='y'||jian=='Y')
fp=fopen("C:\\student","wb");
else
exit(0);
}
printf("\n=====>提示:文件已經打開,正在導入記錄......\n");
while(!feof(fp))
{
p=(Node*)malloc(sizeof(Node));
if(fread(p,sizeof(Node),1,fp)) /* 將文件的內容放入接點中 */
{
p->next=NULL;
r->next=p;
r=p; /* 將該接點掛入連中 */
count++;
}
}
fclose(fp); /* 關閉文件 */
printf("\n=====>提示:記錄導入完畢,共導入%d條記錄.\n",count);
while(1)
{
menu();
printf("請你選擇操作:");
scanf("%d",&sel);
if(sel==0)
{
if(shoudsave==1)
{ getchar();
printf("\n=====>提示:資料已經改動,是否將改動保存到文件中(y/n)?\n");
scanf("%c",&ch);
if(ch=='y'||ch=='Y')
Save(l);
}
printf("\n=====>提示:你已經退出系統,再見!\n");
break;
}
switch(sel)
{
case 1:Add(l);break; /* 增加學生 */
case 2:Del(l);break;/* 刪除學生 */
case 3:Qur(l);break;/* 查詢學生 */
case 4:Modify(l);break;/* 修改學生 */
case 5:Save(l);break;/* 保存學生 */
case 9:printf("\t\t\t==========幫助信息==========\n");break;
default: Wrong();getchar();break;
}
}
}
/* */