stdbool.h - boolean type and values

#include <stdbool.h>

The <stdbool.h> header shall define the following macros:

bool

Expands to _Bool.

true

Expands to the integer constant 1.

false

Expands to the integer constant 0.

__bool_true_false_are_defined

Expands to the integer constant 1.

An application may undefine and then possibly redefine the macros bool, true, and false.

The following sections are informative.

None.

None.

The ability to undefine and redefine the macros bool, true, and false is an obsolescent feature and may be withdrawn in a future version.

None.

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .