w7

w7/Score.java

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+package Homework;
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+public class Score {
+    public static void main(String[] args) {
+        String filepath="score.txt";
+        int sum=0;
+        int count=0;
+        double average=0.0;
+        try(BufferedReader br=new BufferedReader(new FileReader(filepath))){
+            String line;
+            while((line=br.readLine())!=null){
+                line=line.trim();
+                if (line.isEmpty()){
+                    continue;
+                }
+                try{
+                    int score=Integer.parseInt(line);
+                    sum+=score;
+                    count++;
+                }catch(NumberFormatException e){
+                    System.out.println("数字格式错误");
+                }
+            }
+            if (count==0){
+                System.out.println("没有有效数据");
+            }else{
+                average=(double)sum/count;
+                System.out.println("平均分是："+average);
+                System.out.println("人数是："+count);
+                System.out.println("总分是："+sum);
+            }
+        }catch(IOException e){
+            System.out.println("文件读取错误");
+        }
+    }
+}