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 copyRec(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 copyRec(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)

{

copyRec(&records[j],&t);

copyRec(&records[j-1],&records[j]);

copyRec(&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();

}