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import java.io.BufferedReader; |
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import java.io.FileReader; |
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import java.io.IOException; |
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public class ScoreAverageCalculator { |
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public static void main(String[] args) { |
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String filePath = "scores.txt"; |
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int sum = 0; |
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int count = 0; |
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// 使用 try-with-resources 确保流自动关闭 |
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try (BufferedReader br = new BufferedReader(new FileReader(filePath))) { |
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String line; |
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while ((line = br.readLine()) != null) { |
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// 跳过空行 |
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if (line.trim().isEmpty()) { |
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continue; |
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} |
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try { |
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int score = Integer.parseInt(line.trim()); |
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sum += score; |
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count++; |
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} catch (NumberFormatException e) { |
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// 数字格式错误:记录并跳过该行 |
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System.err.println("数字格式错误,跳过无效数据: " + line); |
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} |
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} |
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// 计算并输出平均分 |
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if (count > 0) { |
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double average = (double) sum / count; |
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System.out.println("有效成绩数量: " + count); |
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System.out.println("总分: " + sum); |
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System.out.printf("平均分: %.2f\n", average); |
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} else { |
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System.out.println("没有有效的成绩数据"); |
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} |
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} catch (java.io.FileNotFoundException e) { |
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// 文件不存在异常 |
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System.err.println("错误: 文件 " + filePath + " 不存在,请检查文件路径"); |
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} catch (IOException e) { |
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// 读取错误异常 |
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System.err.println("错误: 读取文件时发生异常 - " + e.getMessage()); |
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} |
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} |
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} |
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