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package chapter4;
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.println("平均:"+(double)sum/count);
}
}