From 431558b5e9fa01c53815cb3ec11a9a82080f5d2b Mon Sep 17 00:00:00 2001
From: lzy <lllzzzyyy@buaa.edu.cn>
Date: Sat, 13 Apr 2024 17:40:07 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E5=85=AB=E7=AB=A0=E6=9B=B4=E6=96=B0?=
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---
 Chapter8/C8-构造类型.md |  6 +++++
 Chapter8/typedef.c      | 57 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100644 Chapter8/typedef.c

diff --git a/Chapter8/C8-构造类型.md b/Chapter8/C8-构造类型.md
index 443a5a2..091a6c0 100644
--- a/Chapter8/C8-构造类型.md
+++ b/Chapter8/C8-构造类型.md
@@ -17,6 +17,7 @@
     - [函数传参（值，地址）](#函数传参值地址-1)
     - [位域](#位域)
   - [枚举](#枚举)
+  - [typedef](#typedef)
 
 
 # 构造类型
@@ -224,3 +225,8 @@ enum 标识符
 };
 ```
 
+## typedef
+
+为已有的数据类型改名。
+
+`typedef 已有的数据类型 新名字;`
\ No newline at end of file
diff --git a/Chapter8/typedef.c b/Chapter8/typedef.c
new file mode 100644
index 0000000..e7a7e16
--- /dev/null
+++ b/Chapter8/typedef.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+// #define INT int;
+
+typedef int INT;
+
+/**
+ * #define IP int *;
+ * IP p,q;  ->  int *p, q;
+ *
+ * typedef int *IP;
+ * IP p,q;  ->  int *p, *q;
+ *
+ */
+
+/**
+ * typedef int ARR[6];   -->   int [6] -> ARR
+ *
+ * ARR a;  ->  int a[6];
+ *
+ */
+
+#if 0
+typedef struct node_st
+{
+    int   i;
+    float p;
+} NODE, *NODEP;
+
+NODE  a;   // struct node_st a;
+NODE *p;
+
+NODEP p;   // struct node_st *p;
+#endif
+
+
+/**
+ * typedef int FUNC(int);  -->  int(int) FUNC;
+ * FUNC f;  -->  int f(int);
+ *
+ * typedef int *FUNCP(int);
+ * FUNCP p; -->  int *p(int);
+ *
+ * typedef int *(*FUNCP)(int);
+ * FUNCP p; --> int *(*p)(int);
+ *
+ */
+
+int main()
+{
+    INT i = 100;   // int i;
+
+    printf("%d\n", i);
+
+    exit(0);
+}
\ No newline at end of file