java/w7/Score.java

package Homework;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class Score {
    public static void main(String[] args) {
        String filepath="score.txt";
        int sum=0;
        int count=0;
        double average=0.0;
        try(BufferedReader br=new BufferedReader(new FileReader(filepath))){
            String line;
            while((line=br.readLine())!=null){
                line=line.trim();
                if (line.isEmpty()){
                    continue;
                }
                try{
                    int score=Integer.parseInt(line);
                    sum+=score;
                    count++;
                }catch(NumberFormatException e){
                    System.out.println("数字格式错误");
                }
            }
            if (count==0){
                System.out.println("没有有效数据");
            }else{
                average=(double)sum/count;
                System.out.println("平均分是："+average);
                System.out.println("人数是："+count);
                System.out.println("总分是："+sum);
            }
        }catch(IOException e){
            System.out.println("文件读取错误");
        }
    }
}