8.5



#include<stdio.h>
#define N 40
int Average(int score[],int n);
int ReadScore(int score[]);
int GetAboveAver(int score[],int n);
int main()
{
    int score[N],m,n;
    n=ReadScore(score);
    printf("%d\n",n);
    m=GetAboveAver(score,n);
    if(m!=-1)
        printf("%d\n",m);
    return 0;
}
int Average(int score[],int n)
{
    int i,sum=0;
    for(i=0;i<n;i++)
    {
        sum+=score[i];
    }
    return n>0?sum/n:-1;
}
int ReadScore(int score[])
{
    int i=-1;
    do
    {
        i++;
        printf("Input score:");
        scanf("%d",&score[i]);
    }
    while(score[i]>=0);
    return i;
}
int GetAboveAver(int score[],int n)
{
    int i,aver,count=0;
    aver=Average(score,n);/*计算并打印平均分*/
    if(aver==-1)
        return -1;
    printf("%d\n",aver);
    for(i=0;i<n;i++)
    {
        if(score[i]>=aver)
            count++;
    }
 return count;
}