??????C????C++?????У?typedef??????????C?????????????typedef??#define??Щ???????????????????????Щ??????÷?????????????ЩC/C++???????????????????????typedef???????????????????????????????????ù????????????????????????

???????????壺

????typedef?C?????????????????????????????????????????????????????????????????????int??char????????????????????struct??????????????typedef?????????????????????????????????????????????????????????Щ?????????????????

????????????#define??????

????typedef ????е??? #define ????????????????????????????? typedef ????????????????????????????????????????????????滻??

??????????????????

?????????????????????????????????滻???????????????????????????????磺

char* pa?? pb; // ????????????????????????????????????????????????
// ??????????????

????????????У?

typedef char* PCHAR;
PCHAR pa?? pb;

?????????÷?????????????char* pa??pb????壬???????????????????????????????????????????typedef char* PCHAR????????????????????????????????

????????????????

??????????C?????У?????struct???????????У?????struct?????????????????struct?????????? struct ?????????????磺

struct tagPOINT1
 {
    int x;
    int y;
};
struct tagPOINT1 p1;

????????C++?У?????????д??????????????????tagPOINT1 p1??

typedef struct tagPOINT
{
    int x;
    int y;
}POINT;

????POINT p1; // ???????????????д?????struct???????￡????????????????????????C++?У?typedef????????????????????????????????????????????????а?????????????????????п????????????Щ????????????????

?????????????????

??????typedef???????????????????

????typedef ?????????????????????????????????????????磬????????????? REAL ??????????????????????????????????

????typedef long double REAL;

?????????? long double ?????????? typedef ????????????????????

????typedef double REAL;

????????????? double ???????????????? typedef ????????????????

????typedef float REAL;

????????????????????????? typedef ?????У????????????????κ?????

???????????????????????????size_t?????????typedef????????????????±??????????????????滻????????????????????