From dcf940de589428557d39dc46e2fca2209cd0e683 Mon Sep 17 00:00:00 2001
From: Didnelpsun <2675350965@qq.com>
Date: Mon, 12 Sep 2022 23:32:55 +0800
Subject: [PATCH] Update 2-stack-ex.md

---
 Data-Structrue/2-stack-ex.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Data-Structrue/2-stack-ex.md b/Data-Structrue/2-stack-ex.md
index 9d944cf..b5a530c 100644
--- a/Data-Structrue/2-stack-ex.md
+++ b/Data-Structrue/2-stack-ex.md
@@ -46,6 +46,8 @@ $D.7$
 
 ## 栈的应用
 
+### 中缀转后缀
+
 从左到右扫描中缀表达式。遇到数字加入后缀表达式，遇到运算符：
 
 1. 若为“(”，入栈。