W7-徐景旺-202414010701

W7/ScoreAvg.java

@@ -0,0 +1,29 @@
+public class ScoreAvg {
+    public static void main(String[] args) {
+        int sum = 0;
+        int count = 0;
+        double average = 0;
+        try (java.io.BufferedReader br = new java.io.BufferedReader(new java.io.FileReader("scores.txt"))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                try {
+                    int score = Integer.parseInt(line.trim());
+                    sum += score;
+                    count++;
+                } catch (NumberFormatException e) {
+                    System.out.println("格式错误跳过该行" + line);
+                }
+            }
+            if (count > 0) {
+                average = (double) sum / count;
+                System.out.println("总分：" + sum);
+                System.out.println("人数：" + count);
+                System.out.println("平均分：" + average);
+            } else {
+                System.out.println("文件内无有效数据");
+            }
+        } catch (java.io.IOException e) {
+            System.out.println("文件操作出错：" + e.getMessage());
+        }
+    }
+}