Language Ccpp Cref Man Assert.htm

 <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 &lt;assert.h&gt;

       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>


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