C-language custom bool function

The C language does not have a BOOL type variable, it is unique to C + +, because the use of bool type can make the code more readable, many programmers have their own definition of a similar application in C, the general method has two kinds:

The first type: Using macro definition Method

typedef int BOOL;

#define TRUE 1

#define FALSE 0

or write as:

#ifndef BOOL

#define BOOL INT

#endif

#ifndef true
#define TRUE 1
#endif

#ifndef false
#define FALSE 0
#endif

The second kind: Using the enumeration type variable way

typedef enum{false=0,true}bool;

C-language custom bool function