stdbool.h

The header stdbool.h in the C Standard Library for the C programming language contains four macros. This header was introduced in C99.

The macros as defined in IEEE Std 1003.1-2001 are :

• bool which expands to _Bool
• true which expands to 1
• false which expands to 0
• __bool_true_false_are_defined which expands to 1

Programs using these macros can undefine and then redefine bool, true, and false.

External links

• [1]: A source code for this header file
• stdbool.h: boolean type and values – Base Definitions Reference, The Single UNIX Specification, Version 5 from The Open Group