The use and difference of C-language typedef and define

#define是C的指令, used to define aliases for various data types, similar to TypeDef, but with a few different

1,typedef is limited to defining a symbol name for a type, and # define can define not only the symbol name for the type, but also the alias for the value, such as 1 to true;

The 2,typedef is interpreted by the compiler, #define是由预编译器进行处理的.

#include"stdafx.h"#include"string.h";#defineTRUE 1#defineFlase 0typedefCharBYTE;intMain () {printf ("true=%d\n", TRUE); printf ("flase=%d\n", flase);    BYTE A, B; A= -; b=102; printf ("a=%d\n", a); printf ("b=%d\n", b);}

Operation Result:

The use and difference of C-language typedef and define