题解 | 求平均数

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        //write your code here......
        

        //输出格式为：System.out.println(String.format("%.2f",avg));
         int n = scan.nextInt();
        int count = 0;
        int sum = 0;
        double avg=0;
        while(n>0) {
            count++;
            sum+=n;
            n=scan.nextInt();
        }
        avg =(double)sum/count;
        System.out.println(String.format("%.2f",avg));

    }
}

记得转换类型
avg =(double)sum/count;