ASSERT

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
CONFORMING TO
BUGS
SEE ALSO

NAME

assert − Abort the program if assertion is false.

SYNOPSIS

#include <assert.h>

void assert (int expression);

DESCRIPTION

assert() prints an error message to standard output and terminates the program by calling abort() if expression is false (i.e., compares equal to zero). This only happens when the macro NDEBUG is undefined.

RETURN VALUE

No value is returned.

CONFORMING TO

ISO9899 (ANSI C)

BUGS

assert() is implemented as a macro; if the expression tested has side - effects, program behaviour will be different depending on whether NDEBUG is defined. This may create Heisenbugs which go away when debugging is turned on.

SEE ALSO

exit(3), abort(3)