Update chapter3_traps.md

4 years ago · 4477a7d039
parent 1e19a1155b
commit 4477a7d039
1 changed files with 2 additions and 2 deletions
--- a/chapter3_traps.md
+++ b/chapter3_traps.md
@ -1562,7 +1562,7 @@ $ git commit -a -m "my work on lab1_3 is done."

 <a name="lab1_challenge1_backtrace"></a>

-## 3.5 lab1_challenge1 挑战一：打印用户程序调用栈
+## 3.5 lab1_challenge1 挑战一：打印用户程序调用栈（难度：&#9733;&#9733;&#9734;&#9734;&#9734;）

 <a name="lab1_challenge1_app"></a>

@ -1673,7 +1673,7 @@ $ git merge lab1_3_irq -m "continue to work on lab1_challenge1"

 <a name="lab1_challenge2_errorline"></a>

-# 3.6 lab1_challenge2 挑战二：打印异常代码行
+## 3.6 lab1_challenge2 挑战二：打印异常代码行（难度：&#9733;&#9733;&#9733;&#9733;&#9734;）

 <a name="lab1_challenge2_app"></a>