#include<stdio.h>
typedef struct Student{
int num;
char name[20];
char dengji
 ;
};
main(){
int i,x,a=0,b=0,c=0,d=0,e=0;
Student student[100];
printf("number: ");
scanf("%d",&x);
for(i=0;i<x;i++){
printf("input student%d info\n",i+1);
printf("num name dengji");
scanf("%d",&student[i].num);getchar();
scanf("%s",&student[i].name);getchar();
scanf("%c",&student[i].dengji);getchar();
if(student[i].dengji=='A')a=a+1;
if(student[i].dengji=='B')b=b+1;
if(student[i].dengji=='C')c=c+1;
if(student[i].dengji=='D')d=d+1;
if(student[i].dengji=='E')e=e+1;
}
printf("A:%d B:%d C:%d D:%d E:%d",a,b,c,d,e);
}

#include<stdio.h>

struct Student
{
    int num;
    char name[20];
    char dengji;
};

int main()
{
    int i,x,a=0,b=0,c=0,d=0,e=0;
    struct Student student[100];
    printf("number: ");
    scanf("%d",&x);
    for(i=0;i<x;i++)
    {
        printf("input student%d info\n",i+1);
        printf("num name dengji");
        scanf("%d",&student[i].num);getchar();
        scanf("%s",&student[i].name);getchar();
        scanf("%c",&student[i].dengji);getchar();
        if(student[i].dengji=='A')a=a+1;
        if(student[i].dengji=='B')b=b+1;
        if(student[i].dengji=='C')c=c+1;
        if(student[i].dengji=='D')d=d+1;
        if(student[i].dengji=='E')e=e+1;
    }
    printf("A:%d B:%d C:%d D:%d E:%d",a,b,c,d,e);
    return 0;
} 

VC编译器？
若是的话，把源程序名自己加上.C

谢谢啦。怎么才能将其信息存入文件中呢