题解 | #求平均年龄#
求平均年龄
https://www.nowcoder.com/practice/ca319fdb02714994850cc631d76f5547
#include <iostream>
using namespace std;
int main() {
int n;
double sum = 0;
while(scanf("%d", &n) != EOF){
int age;
for(int i = 0; i < n; i++){
scanf("%d", &age);
sum += age;
}
printf("%.2f\n", sum / n);
}
}
// 64 位输出请用 printf("%lld")
