poj 2350 Above Average

#include<stdio.h>#include<string.h>#include<algorithm>using namespace std;int main(){    int _,i,n,ans;    double a[1024],sum;    scanf("%d",&_);    while(_--)    {        scanf("%d",&n);        sum=0;        for(i=0;i<n;i++)        {            scanf("%lf",&a[i]);            sum+=a[i];        }        sum=1.0*sum/n;        ans=0;        for(i=0;i<n;i++)        {            if(a[i]>sum) ans++;        }        sum=1.0*ans/n*100;        printf("%.3f%%\n",sum);    }    return 0;}