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<a name="wcscat_002d_002d_002dconcatenate-two-wide_002dcharacter-strings"></a>
<h3 class="section">6.7 <code>wcscat</code>&mdash;concatenate two wide-character strings</h3>
<a name="index-wcscat"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;wchar.h&gt;
wchar_t *wcscat(wchar_t *__restrict <var>s1</var>,
    const wchar_t *__restrict <var>s2</var>);

</pre></div>
<p><strong>Description</strong><br>
The <code>wcscat</code> function appends a copy of the wide-character string
pointed to by <var>s2</var> (including the terminating null wide-character
code) to the end of the wide-character string pointed to by <var>s1</var>.
The initial wide-character code of <var>s2</var> overwrites the null
wide-character code at the end of <var>s1</var>. If copying takes place between
objects that overlap, the behaviour is undefined. 
</p>
<br>
<p><strong>Returns</strong><br>
The <code>wcscat</code> function returns <var>s1</var>;
no return value is reserved to indicate an error. 
</p>
<br>
<p><strong>Portability</strong><br>
<code>wcscat</code> is ISO/IEC 9899/AMD1:1995 (ISO C).
</p>
<p>No supporting OS subroutines are required.
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