#include<stdio.h>
#define N 30
#define M 6
typedef struct
{
    int number;
    int name;
    int grade[M];
    int sgrade;
    int agrade;
}student;//½¨Á¢½á¹¹Ìå
student a[30];
int main(){
    int i,j,average,sum,m,n;
    scanf("%d%d",&n,&m);
    for(i=0;i<=n-1;i++)
    {
        printf("Please input the No.%2d student's number and name.\n",i+1);
        scanf("%d%s",&a[i].number,&a[i].name);
        for(j=0;j<=m-1;j++)
        {
            printf("Please input the No.%2d student's No.%d subject grades.\n",i+1,j+1);
            scanf("%d",&a[i].grade[j]);
        }
    }
        
   
    for(i=0;i<=n-1;i++)   
    {
        sum=0;
        for(j=0;j<=m-1;j++)
            sum=sum+(a[i]).grade[j];
        average=sum/m;
        a[i].sgrade=sum;
        a[i].agrade=average;
    }
    printf("%16s%5s%5s\n","name","sum","average");
    for(i=0;i<=n-1;i++)
    printf("%16s%5d%5d\n",(a[i]).name,(a[i]).sgrade,(a[i]).agrade);
}

希望各位给我一些指导。

一开始是输入 人数和科目数。不好意思，这个是一个整体拿出来测试的一部分。