如何在sum第一次赋值后第二次使用还是初始值0

Question

Answer 1

#include <stdio.h>
int main()
{
    int ri, repeat;
    int i, n, sum;
    float aver;
    int a[10];

    scanf("%d", &repeat);
    for (ri=1; ri<=repeat; ri++){
        scanf("%d", &n);
        for(i=0; i<n; i++)
            scanf("%d",&a[i]);
        sum = 0;
        aver = 0;
        for(i=0; i<n; i++)
            sum += a[i];
        aver = sum*1.0/n;
        printf("aver=%.2f\n",aver);
    }
    return 0;
}