stdbool.h

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C Standard Library headers

assert.h complex.h ctype.h errno.h fenv.h float.h inttypes.h iso646.h limits.h locale.h math.h setjmp.h signal.h stdarg.h stdbool.h stddef.h stdint.h stdio.h stdlib.h string.h tgmath.h time.h wchar.h wctype.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.

[edit] External links

• [1]: A source code for this header file
• stdbool.h: boolean type and values – Base Definitions Reference, The Single UNIX® Specification, Issue 6 from The Open Group