ScoreAverage.java

import java.util.Scanner;

 

public class ScoreAverage{

  public static void main(String[]args){

    Scanner scanner=new Scanner(System.in);

    int score=0;

    int sum=0;

    int count=-1;

 

    while(score !=-1){

      count++;

      sum += score;

      System.out.print("输入分数(－１结束):  ");

      score=scanner.nextInt();

    }

 

    System.out.print("平均: "+(double)sum/count);

  }

}