SDUT1081Above Average

水题，学会了怎么打印%

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
    int C;
    scanf("%d",&C);
    while(C--)
    {
        int N,k=0;
        double a[1050],s=0;
        scanf("%d",&N);
        for(int i=0;i<N;i++)
        {
            scanf("%lf",&a[i]);
            s+=a[i];
        }
        double aver=s/(double)N;
        //printf("%lf",aver);
        for(int i=0;i<N;i++)
            if(a[i]>aver)
            k++;
        printf("%.3lf%%",(double)k/(double)N*100.0);
        if(C)
            printf("\n");
    }
}