java/w7/Try.java

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileNotFoundException;
import java.io.IOException;

public class Try {
    public static void main(String[] args) {
        int sum = 0;
        int count = 0;
        
        try (BufferedReader br = new BufferedReader(new FileReader("scores.txt"))) {
            String line;
            while ((line = br.readLine()) != null) {
                try {
                    sum += Integer.parseInt(line);
                    count++;
                } catch (NumberFormatException e) {
                    System.out.println("警告：第" + (count + 1) + "行不是有效的数字: " + line);
                }
            }
            
            if (count > 0) {
                System.out.println("总分：" + sum);
                System.out.println("平均分：" + (sum * 1.0 / count));
            } else {
                System.out.println("没有有效的成绩数据");
            }
        } catch (FileNotFoundException e) {
            System.out.println("错误：文件不存在或无法访问: " + e.getMessage());
        } catch (IOException e) {
            System.out.println("错误：文件读取失败: " + e.getMessage());
        } catch (Exception e) {
            System.out.println("错误：发生未知错误: " + e.getMessage());
        }
    }
}