求平均年龄

练习一下C++精度设置

#include<iostream>
#include<iomanip>

using namespace std;

int main() {
    int n, num;
    while (cin >> n) {
        float sum = 0;
        for(int i = 0; i < n; i ++){
            cin >> num;
            sum += num;
        }
        cout << fixed << setprecision(2) << sum / n << endl;
    }
    return 0;
}