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<a name="ldiv_002d_002d_002ddivide-two-long-integers"></a>
<h3 class="section">2.21 <code>ldiv</code>&mdash;divide two long integers</h3>
<a name="index-ldiv"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;stdlib.h&gt;
ldiv_t ldiv(long <var>n</var>, long <var>d</var>);

</pre></div>
<p><strong>Description</strong><br>
Divide
<var>n</var>/<var>d</var>,
returning quotient and remainder as two long integers in a structure <code>ldiv_t</code>.
</p>
<br>
<p><strong>Returns</strong><br>
The result is represented with the structure
</p>
<div class="smallexample">
<pre class="smallexample"> typedef struct
 {
  long quot;
  long rem;
 } ldiv_t;
</pre></div>

<p>where the <code>quot</code> field represents the quotient, and <code>rem</code> the
remainder.  For nonzero <var>d</var>, if &lsquo;<code><var>r</var> = ldiv(<var>n</var>,<var>d</var>);</code>&rsquo; then
<var>n</var> equals &lsquo;<code><var>r</var>.rem + <var>d</var>*<var>r</var>.quot</code>&rsquo;.
</p>
<p>To divide <code>int</code> rather than <code>long</code> values, use the similar
function <code>div</code>.
</p>
<br>
<p><strong>Portability</strong><br>
<code>ldiv</code> is ANSI.
</p>
<p>No supporting OS subroutines are required.
</p>
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