diff --git a/W7 b/W7
new file mode 100644
index 0000000..474c1c2
--- /dev/null
+++ b/W7
@@ -0,0 +1,47 @@
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+public class ScoreAverageCalculator {
+    public static void main(String[] args) {
+        String filePath = "scores.txt";
+        int sum = 0;
+        int count = 0;
+
+        // 使用 try-with-resources 确保流自动关闭
+        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                // 跳过空行
+                if (line.trim().isEmpty()) {
+                    continue;
+                }
+                try {
+                    int score = Integer.parseInt(line.trim());
+                    sum += score;
+                    count++;
+                } catch (NumberFormatException e) {
+                    // 数字格式错误：记录并跳过该行
+                    System.err.println("数字格式错误，跳过无效数据: " + line);
+                }
+            }
+
+            // 计算并输出平均分
+            if (count > 0) {
+                double average = (double) sum / count;
+                System.out.println("有效成绩数量: " + count);
+                System.out.println("总分: " + sum);
+                System.out.printf("平均分: %.2f\n", average);
+            } else {
+                System.out.println("没有有效的成绩数据");
+            }
+
+        } catch (java.io.FileNotFoundException e) {
+            // 文件不存在异常
+            System.err.println("错误: 文件 " + filePath + " 不存在，请检查文件路径");
+        } catch (IOException e) {
+            // 读取错误异常
+            System.err.println("错误: 读取文件时发生异常 - " + e.getMessage());
+        }
+    }
+}
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