ScoreAverage

w7/ScoreAverage.java

@@ -0,0 +1,36 @@
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class ScoreAverage {
+    public static void main(String[] args) {
+        String filePath = "scores.txt";
+        int sum = 0;
+        int count = 0;
+
+        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                line = line.trim();
+                if (line.isEmpty()) continue;
+                
+                try {
+                    sum += Integer.parseInt(line);
+                    count++;
+                } catch (NumberFormatException e) {
+                    System.err.println("无效成绩：" + line);
+                }
+            }
+
+            if (count > 0) {
+                double avg = (double) sum / count;
+                System.out.println("平均分：" + avg);
+            } else {
+                System.out.println("无有效成绩数据");
+            }
+
+        } catch (IOException e) {
+            System.err.println("文件读取失败：" + e.getMessage());
+        }
+    }
+}