上传文件至 'W7周梓浩202506050319'

W7周梓浩202506050319/score.java

@@ -0,0 +1,48 @@
+import java.io.*;
+
+/*原始代码
+BufferedReader br=new BufferedReader(new FileReader("score.txt"))
+String line;
+while((line=br.readLine())!=null){
+    sum += Integer.parseInt(line)
+}
+br.close()
+ */
+
+
+//修改后的代码
+public class score {
+    public static void main(String[] args){
+        //使用try()-with-resources确保文件自动关闭
+        try(BufferedReader br=new BufferedReader(new FileReader("score.txt"))){
+            double sum=0;
+            int count=0;
+            String line;
+            while((line=br.readLine())!=null){
+                try{
+                    sum += Integer.parseInt(line);
+                    count++;
+                } catch (NumberFormatException e) {
+                    System.out.println("数字格式错误");
+                }
+            }
+
+            //计算平均数
+            if (count>0){
+                double average=sum/count;
+                System.out.println("平均分是"+average);
+            }
+            else{
+                System.out.println("计数不符合规范，没有平均数");
+            }
+        }
+        //最外层的catch
+        catch (FileNotFoundException e){
+            System.out.println("文件不存在");
+        }
+        //同样也是最外层的catch
+        catch (IOException e){
+            System.out.println("读取文件发生错误");
+        }
+    }
+}