<TITLE>assert</TITLE>
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<h3>ASSERT(3) Linux Programmer's Manual ASSERT(3)
</h3>
<h3>NAME
</h3> assert - Abort the program if assertion is false.
<h3>SYNOPSIS
</h3> #include <assert.h>
void assert (int expression);
<h3>DESCRIPTION
</h3> 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.
<h3>RETURN VALUE
</h3> No value is returned.
<h3>CONFORMS TO
</h3> ANSI - C
<h3>BUGS
</h3> assert() is implemented as a macro; if the expression
tested has side - effects, program behaviour will be dif-
ferent depending on whether NDEBUG is defined. This may
create Heisenbugs which go away when debugging is turned
on.
</pre>
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<h3>SEE ALSO
</h3><p>
<a href=exit.htm>exit</a>,
<a href=abort.htm>abort</a>,
<pre>
<h3>GNU April 4, 1993 1
</h3>
</pre>
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