devdocs/c/string%2Fwide%2Fiswctype.html


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    <h1 id="firstHeading" class="firstHeading">iswctype</h1>            <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code>&lt;wctype.h&gt;</code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl"> <td> <pre data-language="c">int iswctype( wint_t wc, wctype_t desc );</pre>
</td> <td class="t-dcl-nopad"> </td> <td> <span class="t-mark-rev t-since-c95">(since C95)</span> </td> </tr>  </table> <p>Classifies the wide character <code>wc</code> using the current C locale's <code><a href="../../locale/lc_categories" title="c/locale/LC categories">LC_CTYPE</a></code> category identified by <code>desc</code>.</p>
<h3 id="Parameters"> Parameters</h3> <table class="t-par-begin"> <tr class="t-par"> <td> wc </td> <td> - </td> <td> the wide character to classify </td>
</tr> <tr class="t-par"> <td> desc </td> <td> - </td> <td> the <code><a href="../../locale/lc_categories" title="c/locale/LC categories">LC_CTYPE</a></code> category, obtained from a call to <code><a href="wctype" title="c/string/wide/wctype">wctype</a></code> </td>
</tr>
</table> <h3 id="Return_value"> Return value</h3> <p>Non-zero if the character <code>wc</code> has the property identified by <code>desc</code> in <code><a href="../../locale/lc_categories" title="c/locale/LC categories">LC_CTYPE</a></code> facet of the current C locale, zero otherwise.</p>
<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include &lt;locale.h&gt;
#include &lt;stdio.h&gt;
#include &lt;wchar.h&gt;
#include &lt;wctype.h&gt;
 
const char* classify(wchar_t wc, const char* cat)
{
    return iswctype(wc, wctype(cat)) ? "true" : "false";
}
 
int main(void)
{
    setlocale(LC_ALL, "ja_JP.UTF-8");
    puts("The character \u6c34 is...");
    const char* cats[] = {"digit", "alpha", "space", "cntrl", "jkanji"};
    for (int n = 0; n &lt; 5; ++n)
        printf("%s?\t%s\n", cats[n], classify(L'\u6c34', cats[n]));
}</pre></div> <p>Output:</p>
<div class="text source-text"><pre data-language="c">The character 水 is...
digit?  false
alpha?  true
space?  false
cntrl?  false
jkanji? true</pre></div> </div> <h3 id="References"> References</h3>  <ul>
<li> C23 standard (ISO/IEC 9899:2023): </li>
<ul><li> 7.30.2.2.1 The iswctype function (p: TBD) </li></ul>
<li> C17 standard (ISO/IEC 9899:2018): </li>
<ul><li> 7.30.2.2.1 The iswctype function (p: TBD) </li></ul>
<li> C11 standard (ISO/IEC 9899:2011): </li>
<ul><li> 7.30.2.2.1 The iswctype function (p: 451-452) </li></ul>
<li> C99 standard (ISO/IEC 9899:1999): </li>
<ul><li> 7.25.2.2.1 The iswctype function (p: 397-398) </li></ul>
</ul>               <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="wctype" title="c/string/wide/wctype"> <span class="t-lines"><span>wctype</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div> </td> <td> looks up a character classification category in the current C locale <br> <span class="t-mark">(function)</span>  </td>
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