上传W7作业

W7/ScoreAverage.java

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+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class ScoreAverage {
+    public static void main(String[] args) {
+        String fileName = "scores.txt";
+        int sum = 0;
+        int count = 0;
+
+        // try-with-resources 自动关闭文件流
+        try (BufferedReader br = new BufferedReader(new FileReader(fileName))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                line = line.trim();
+                if (line.isEmpty()) {
+                    continue; // 跳过空行
+                }
+
+                // 处理数字格式错误
+                try {
+                    int score = Integer.parseInt(line);
+                    sum += score;
+                    count++;
+                } catch (NumberFormatException e) {
+                    System.err.println("警告：无法解析为整数，跳过该行内容：" + line);
+                }
+            }
+
+            // 计算并输出平均分
+            if (count > 0) {
+                double average = (double) sum / count;
+                System.out.printf("总分：%d，有效成绩数：%d，平均分：%.2f%n", sum, count, average);
+            } else {
+                System.out.println("文件中没有有效的成绩数据。");
+            }
+
+        } catch (IOException e) {
+            // 处理文件不存在、读取错误等IO异常
+            System.err.println("文件操作出错：" + e.getMessage());
+            e.printStackTrace();
+        }
+    }
+}

W7/ScoreFileReader.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

W7/desktop.ini

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+[LocalizedFileNames]
+ÆÁÄ»½Øͼ 2026-04-19 235510.png=@ÆÁÄ»½Øͼ 2026-04-19 235510,0

W7/scores.txt

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+85
+92
+78
+90
+88