diff --git a/README.md b/README.md
index 7280df4..40e9e42 100644
--- a/README.md
+++ b/README.md
@@ -158,27 +158,27 @@
 -  [编写C语言程序注意点](https://www.ixigua.com/6976577057052426783?id=6976746560394789413) 
 -  [main函数的其它写法](https://www.ixigua.com/6976577057052426783?id=6977179980065309214) 
 -  [注释基本概念](https://www.ixigua.com/6976577057052426783?id=6977180598238609951) 
--  [注释的注意点和应用场景](https://edu.csdn.net/learn/31452) 
--  [C语言关键字](https://edu.csdn.net/learn/31452) 
--  [C语言标识符](https://edu.csdn.net/learn/31452) 
--  [标识符命名规范](https://edu.csdn.net/learn/31452) 
--  [C语言数据类型](https://edu.csdn.net/learn/31452) 
--  [C语言常量](https://edu.csdn.net/learn/31452) 
--  [C语言变量定义](https://edu.csdn.net/learn/31452) 
--  [C语言变量使用](https://edu.csdn.net/learn/31452) 
--  [变量的其它定义方式和初始化方式](https://edu.csdn.net/learn/31452) 
--  [变量的作用域](https://edu.csdn.net/learn/31452) 
--  [变量的注意点(掌握)](https://edu.csdn.net/learn/31452) 
--  [printf函数输出不同类型数据(掌握)](https://edu.csdn.net/learn/31452) 
--  [printf函数宽度和标志(掌握)](https://edu.csdn.net/learn/31452) 
--  [printf函数精度和长度(掌握)](https://edu.csdn.net/learn/31452) 
--  [scanf函数基本使用(掌握)](https://edu.csdn.net/learn/31452) 
--  [scanf函数注意点(掌握)](https://edu.csdn.net/learn/31452) 
--  [scanf函数实现原理(掌握)](https://edu.csdn.net/learn/31452) 
--  [清空输入缓冲区(掌握)](https://edu.csdn.net/learn/31452) 
--  [运算符基本概念(理解)](https://edu.csdn.net/learn/31452) 
--  [算数运算符(掌握)](https://edu.csdn.net/learn/31452) 
--  [算数运算注意点(掌握)](https://edu.csdn.net/learn/31452) 
+-  [注释的注意点和应用场景](https://www.ixigua.com/6976577057052426783?id=6977181533085893150) 
+-  [C语言关键字](https://www.ixigua.com/6976577057052426783?id=6977486443773952548) 
+-  [C语言标识符](https://www.ixigua.com/6976577057052426783?id=6977487784059601444) 
+-  [标识符命名规范](https://www.ixigua.com/6976577057052426783?id=6977488357387403789) 
+-  [C语言数据类型](https://www.ixigua.com/6976577057052426783?id=6977488976919659021) 
+-  [C语言常量](https://www.ixigua.com/6976577057052426783?id=6977593423155069470) 
+-  [C语言变量定义](https://www.ixigua.com/6976577057052426783?id=6977594345369109022) 
+-  [C语言变量使用](https://www.ixigua.com/6976577057052426783?id=6977594957351780894) 
+-  [变量的其它定义方式和初始化方式](https://www.ixigua.com/6976577057052426783?id=6977595648187204109) 
+-  [变量的作用域](https://www.ixigua.com/6976577057052426783?id=6977596224505381383) 
+-  [变量的注意点(掌握)](https://www.ixigua.com/6976577057052426783?id=6978013072422076965) 
+-  [printf函数输出不同类型数据(掌握)](https://www.ixigua.com/6976577057052426783?id=6978013565231825422) 
+-  [printf函数宽度和标志(掌握)](https://www.ixigua.com/6976577057052426783?id=6978014015192564232) 
+-  [printf函数精度和长度(掌握)](https://www.ixigua.com/6976577057052426783?id=6978014635223941645) 
+-  [scanf函数基本使用(掌握)](https://www.ixigua.com/6976577057052426783?id=6978015074241741349) 
+-  [scanf函数注意点(掌握)](https://www.ixigua.com/6976577057052426783?id=6978026194759483917) 
+-  [scanf函数实现原理(掌握)](https://www.ixigua.com/6976577057052426783?id=6978026710289777159) 
+-  [清空输入缓冲区(掌握)](https://www.ixigua.com/6976577057052426783?id=6978027249991680548) 
+-  [运算符基本概念(理解)](https://www.ixigua.com/6976577057052426783?id=6978028096507085349) 
+-  [算数运算符(掌握)](https://www.ixigua.com/6976577057052426783?id=6978028673999831565) 
+-  [算数运算注意点(掌握)](https://www.ixigua.com/6976577057052426783?id=6978255893913666085) 
 -  [自动类型转换上(掌握)](https://edu.csdn.net/learn/31452) 
 -  [自动类型转换下(掌握)](https://edu.csdn.net/learn/31452) 
 -  [强制类型转换(掌握)](https://edu.csdn.net/learn/31452)