java求平均年龄

解题思路:

注意事项:

参考代码:

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

int n=in.nextInt();

int i=1;

int sum=0;

while(i<=n){

  int x=in.nextInt();

  sum+=x;

  i++;

}

System.out.printf("%.2f",1.0*sum/n);

}

}