想要得到总平均成绩和最高分学生的数据，可是它哪里错了？

Question

#include <stdio.h>
#define N 10
typedef struct student
{
long studentID;
char name[10];
int score[3];
float avg;
}STUDENT;
void input(STUDENT stu[],int n,int m);
void average(STUDENT stu[],float aver[],int n,int m);
int max(float aver[],int n,int m);
int main()
{
float aver[N];
STUDENT stu[N];
int a,i,j;
float sum=0;
printf("请输入每位同学的学号、姓名、3门课的成绩：");
input(stu,N,3);
average(stu,aver,N,3);
printf("三门课的总平均成绩：");
for(i=0;i<N;i++)
{
sum+=aver[i];
}
sum=sum/N;
printf("%f\n",sum);
a=max(aver,N,3);
printf("%10ld%s\n",stu[a].studentID,stu[a].name);
for(j=0;j<3;j++)
{
printf("%d\n",stu[a].score[j]);
}
printf("%f\n",aver[a]);
return 0;
}
void input(STUDENT stu[],int n,int m)
{
int i,j;
for(i=0;i<n;i++)
{
printf("Input record %d:\n",i+1);
scanf("%ld",&stu[i].studentID);
scanf(" %s",stu[i].name);
for(j=0;j<m;j++)
{
scanf("%d",&stu[i].score[j]);
}
}
}
void average(STUDENT stu[],float aver[],int n,int m)
{
int i,j,sum[N];
for(i=0;i<n;i++)
{
sum[i]=0;
for(j=0;j<m;j++)
{
sum[i]=sum[i]+stu[i].score[j];
}
aver[i]=(float)sum[i]/m;
}
}
int max(float aver[],int n,int m)
{
int i,j,k;
for(i=0;i<n-1;i++)
{
k=i;
for(j=i+1;j<n;j++)
{
if(aver[j]>aver[k])
{
k=j;
}
}
}
return k;
}

Answer 1

#include <stdio.h>
#define N 10
typedef struct student
{
    long studentID;
    char name[10];
    int score[3];
    float avg;
}STUDENT;
void input(STUDENT stu[], int n, int m);
void average(STUDENT stu[], float aver[], int n, int m);
int max(float aver[], int n, int m);
int main()
{
    float aver[N];
    STUDENT stu[N];
    int a, i, j;
    float sum = 0;
    printf("请输入每位同学的学号、姓名、3门课的成绩：");
    input(stu, N, 3);
    average(stu, aver, N, 3);
    printf("三门课的总平均成绩：");
    for (i = 0; i < N; i++)
    {
        sum += aver[i];
    }
    sum = sum / N;
    printf("%f\n", sum);
    a = max(aver, N, 3);
    printf("%10ld %s\n", stu[a].studentID, stu[a].name);
    for (j = 0; j < 3; j++)
    {
        printf("%d\n", stu[a].score[j]);
    }
    printf("%f\n", aver[a]);
    return 0;
}
void input(STUDENT stu[], int n, int m)
{
    int i, j;
    for (i = 0; i < n; i++)
    {
        printf("Input record %d:\n", i + 1);
        scanf("%ld", &stu[i].studentID);
        scanf(" %s", stu[i].name);
        for (j = 0; j < m; j++)
        {
            scanf("%d", &stu[i].score[j]);
        }
    }
}
void average(STUDENT stu[], float aver[], int n, int m)
{
    int i, j, sum[N];
    for (i = 0; i < n; i++)
    {
        sum[i] = 0;
        for (j = 0; j < m; j++)
        {
            sum[i] = sum[i] + stu[i].score[j];
        }
        aver[i] = (float)sum[i] / m;
    }
}
int max(float aver[], int n, int m)
{
    int i, j, k;
    for (i = 0; i < n - 1; i++)
    {
        k = i;
        for (j = i + 1; j < n; j++)
        {
            if (aver[j] > aver[k])
            {
                k = j;
            }
        }
    }
    return k;
}