C++ 计算学生平均年龄

#include #include

using namespace std;

int main() { int n; cin >> n;

int sum = 0;
for (int i = 0; i < n; i++) {
    int age;
    cin >> age;
    sum += age;
}

double average = (double)sum / n;

cout << fixed << setprecision(2) << average << endl;

return 0;

}