Using boolean values in C

There are multiple way to use boolean values in C
Option 1

#include <stdbool.h>

Option 2

typedef enum { false, true } bool;

Option 3

typedef int bool;

enum { false, true };

Option 4

typedef int bool;

#define true 1

#define false 0

4 years ago

From best to worse:
Option 1 (C99 and newer)

#include <stdbool.h>

Option 2

typedef enum { false, true } bool;

Option 3

typedef int bool;

enum { false, true };

Option 4

typedef int bool;

#define true 1

#define false 0

#Explanation

Option 1 will work only if you use C99 (or newer) and it's the "standard way" to do it. Choose this if possible.
Options 2, 3 and 4 will have in practice the same identical behavior. #2 and #3 don't use #defines though, which in my opinion is better.
If you are undecided, go with #1!

4 years ago