[백준 10984번] 내 학점을 구해줘

소스코드

---

#include <iostream>
using namespace std;
 
int main() {
    cout.setf(ios::fixed);
    double t,n,c,g;
    cin >> t;
    while (t--) {
        cin >> n;
        c = 0.0, g = 0.0;
        while (n--) {
            double tmpC, tmpG;
            cin >> tmpC >> tmpG;
            c += tmpC, g += (tmpG*tmpC);
        }
        cout.precision(0);
        cout << c;
        cout.precision(1);
        cout << " " << g / c << '\n';
    }
    return 0;
}