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  53. <a name="wcscat_002d_002d_002dconcatenate-two-wide_002dcharacter-strings"></a>
  54. <h3 class="section">6.7 <code>wcscat</code>&mdash;concatenate two wide-character strings</h3>
  55. <a name="index-wcscat"></a>
  56. <p><strong>Synopsis</strong>
  57. </p><div class="example">
  58. <pre class="example">#include &lt;wchar.h&gt;
  59. wchar_t *wcscat(wchar_t *__restrict <var>s1</var>,
  60. const wchar_t *__restrict <var>s2</var>);
  61. </pre></div>
  62. <p><strong>Description</strong><br>
  63. The <code>wcscat</code> function appends a copy of the wide-character string
  64. pointed to by <var>s2</var> (including the terminating null wide-character
  65. code) to the end of the wide-character string pointed to by <var>s1</var>.
  66. The initial wide-character code of <var>s2</var> overwrites the null
  67. wide-character code at the end of <var>s1</var>. If copying takes place between
  68. objects that overlap, the behaviour is undefined.
  69. </p>
  70. <br>
  71. <p><strong>Returns</strong><br>
  72. The <code>wcscat</code> function returns <var>s1</var>;
  73. no return value is reserved to indicate an error.
  74. </p>
  75. <br>
  76. <p><strong>Portability</strong><br>
  77. <code>wcscat</code> is ISO/IEC 9899/AMD1:1995 (ISO C).
  78. </p>
  79. <p>No supporting OS subroutines are required.
  80. </p>
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