#include<stdio.h>
#define N 5
main()
{
    int i,high=0,sum=0,a[N];
    float average;
    printf("input everyone's score.\n");
    for(i=0;i<N;i++)
    {
        scanf("%d",a);
        sum=sum+a[i];
    if (a[i]>high)
        high=a[i];
    }
    average=(float)sum/N;
    printf("%f\n",average);
    printf("%d\n",high);
}运行之后的最大数和平均数都不对 错哪了

scanf("%d",a);
这么不对

#define N 5
main()
{
    int i,high=0,sum=0,a[N];
    float average;
    printf("input everyone's score.\n");
    for(i=0;i<N;i++)
    {
        scanf("%d",&a[i]);  //你在输入数据的时候,要用地址,你原来的程序中只是第一个数组的地址,后面的数据根本没输入.
        sum=sum+a[i];
    if (a[i]>high)
        high=a[i];
    }
    average=(float)sum/N;
    printf("%f\n",average);
    printf("%d\n",high);
}

明白了  用scanf("%d",a+i);谢谢大家