From aeca2d3c16246e836ccde85f78e566f8244918d1 Mon Sep 17 00:00:00 2001
From: ZhengJiayin <13230092115@163.com>
Date: Mon, 23 Mar 2026 18:23:20 +0800
Subject: [PATCH] =?UTF-8?q?feat(w2):=E5=AE=8C=E6=88=90=E6=95=B0=E6=8D=AE?=
 =?UTF-8?q?=E6=B8=85=E6=B4=97?=
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---
 w2/DataCleaner.java | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/w2/DataCleaner.java b/w2/DataCleaner.java
index ed94e95..f0d23d6 100644
--- a/w2/DataCleaner.java
+++ b/w2/DataCleaner.java
@@ -2,25 +2,31 @@ public class DataCleaner {
     public static void main(String[] args) {
         int[] sensorData = {85, -5, 92, 0, 105, 999, 88, 76};
 
-        int validSum = 0;
-        int validCount = 0;
+        int validSum = 0;    // 有效数据总和
+        int validCount = 0;  // 有效数据个数
 
-        for (int data : sensorData) {
-            if (data == 999) {
-                System.out.println("致命错误: 传感器掉线，终止处理");
+        // 遍历数组，按规则处理数据
+        for (int num : sensorData) {
+            // 规则3：致命错误，遇到999直接终止流程
+            if (num == 999) {
+                System.out.println("致命错误：传感器掉线，终止处理");
                 break;
             }
-            if (data <= 0 || data > 100) {
-                System.out.println("警告: 发现越界数据[" + data + "]，已跳过");
+            // 规则2：无效数据（0/负数/大于100且不是999），跳过并告警
+            if (num <= 0 || num > 100) {
+                System.out.println("警告：发现越界数据[" + num + "]，已跳过");
                 continue;
             }
-            validSum += data;
+            // 规则1：正常范围（1-100），计入总和与计数
+            validSum += num;
             validCount++;
         }
 
+        // 规则4：最终输出平均值
         if (validCount > 0) {
-            double avg = (double) validSum / validCount;
-            System.out.println("有效数据平均值: " + avg);
+            // 避免整数除法陷阱：将总和转为double再计算
+            double average = (double) validSum / validCount;
+            System.out.printf("有效数据的平均值为：%.2f%n", average);
         } else {
             System.out.println("无有效数据");
         }