From 60d585f4eeb2018483b1f80b8697e9ea80ff871e Mon Sep 17 00:00:00 2001
From: dongyunpeng <dongyunpeng@sjtu.edu.cn>
Date: Thu, 9 Mar 2023 01:36:30 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E5=96=840707.=E8=AE=BE=E8=AE=A1?=
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---
 problems/0707.设计链表.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/problems/0707.设计链表.md b/problems/0707.设计链表.md
index 43ed2622..de1e7eb4 100644
--- a/problems/0707.设计链表.md
+++ b/problems/0707.设计链表.md
@@ -133,6 +133,11 @@ public:
         LinkedNode* tmp = cur->next;
         cur->next = cur->next->next;
         delete tmp;
+        //delete命令指示释放了tmp指针原本所指的那部分内存，
+        //被delete后的指针tmp的值（地址）并非就是NULL，而是随机值。也就是被delete后，
+        //如果不再加上一句tmp=nullptr,tmp会成为乱指的野指针
+        //如果之后的程序不小心使用了tmp，会指向难以预想的内存空间
+        tmp=nullptr;
         _size--;
     }
 
@@ -1447,3 +1452,4 @@ impl MyLinkedList {
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">
   <img src="../pics/网站星球宣传海报.jpg" width="1000"/>
 </a>
+