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<a name="memcpy"></a>
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<a name="memcpy_002d_002d_002dcopy-memory-regions"></a>
<h3 class="section">5.8 <code>memcpy</code>—copy memory regions</h3>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include <string.h>
void* memcpy(void *restrict <var>out</var>, const void *restrict <var>in</var>,
size_t <var>n</var>);
</pre></div>
<p><strong>Description</strong><br>
This function copies <var>n</var> bytes from the memory region
pointed to by <var>in</var> to the memory region pointed to by
<var>out</var>.
</p>
<p>If the regions overlap, the behavior is undefined.
</p>
<br>
<p><strong>Returns</strong><br>
<code>memcpy</code> returns a pointer to the first byte of the <var>out</var>
region.
</p>
<br>
<p><strong>Portability</strong><br>
<code>memcpy</code> is ANSI C.
</p>
<p><code>memcpy</code> requires no supporting OS subroutines.
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