백준 4344 C++ (소수 반올림, double화)

#include <iostream>
#include <string>
#include <typeinfo>
#include <algorithm>
using namespace std;

int main() {
	int t,ave,hap,cnt;
	double ans;
	cin >> t;
	int a[1001] = {};
	while (t--) {
		int n;
		hap = 0;
		cnt = 0;
		cin >> n;
		for (int i = 0; i < n; i++) {
			cin >> a[i];
			hap += a[i];
		}
		ave = hap / n;
		for (int j = 0; j < n; j++) {
			if (a[j] > ave) {
				cnt += 1;
			}
			
		}
		ans = (double)cnt / n * 100;
		cout << fixed;
		cout.precision(3);
		cout << ans<<"%"<<"\n";
		
	}
}