C语言随笔

typedef:

typedef 定义结构体指针
c语言规范，定义结构体：
typedef struct ANSWER_HEADER
{

u8 u8Type;
u8 u8Code;
u32 u32TimeStamp;
struct ANSWER_HEADER *pNext;

}ANSWER_HEADER_T, *PANSWER_HEADER_T;

ANSWER_HEADER为结构名，这个名字主要是为了在结构体中包含自己为成员变量的时候有用
ANSWER_HEADER_T为struct ANSWER_HEADER的别名
PANSWER_HEADER_T为struct ANSWER_HEADER*的别名

上面的定义方式等价于

struct ANSWER_HEADER
{

u8 u8Type;
u8 u8Code;
u32 u32TimeStamp;
struct ANSWER_HEADER *pNext;

};
typedef struct ANSWER_HEADER ANSWER_HEADER_T;
typedef struct ANSWER_HEADER *PANSWER_HEADER_T;