stdbool.h, stdbool - boolean type and values
#include <stdbool.h>
The <stdbool.h> header defines the following macros:
expands to _Bool
expands to the integer constant 1
expands to the integer constant 0
expands to the integer constant 1
An application can undefine and then possibly redefine the macros bool, true, and false.
See attributes(5) for descriptions of the following attributes:
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