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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>wctype</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_010_722"> </a>NAME</h4><blockquote>wctype - define character class</blockquote><h4><a name = "tag_000_010_723"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="wctype.h.html">wctype.h</a>>wctype_t wctype(const char *<i>property</i>);</code></pre></blockquote><h4><a name = "tag_000_010_724"> </a>DESCRIPTION</h4><blockquote>The<i>wctype()</i>function is defined for valid character class names asdefined in the current locale.The<i>property</i>is a string identifying a generic character class for which codeset-specifictype information is required. The following character class names are definedin all locales - "alnum", "alpha", "blank" "cntrl", "digit", "graph","lower", "print", "punct", "space", "upper" and "xdigit".<p>Additional character class names defined in the locale definition file(category LC_CTYPE) can also be specified.<p>The function returns a value of type<b>wctype_t</b>,which can be used as the second argument to subsequent calls of<i><a href="iswctype.html">iswctype()</a></i>.The<i>wctype()</i>function determines values of<b>wctype_t</b>according to the rules of the codedcharacter set defined by character type informationin the program's locale (category LC_CTYPE).The values returned by<i>wctype()</i>are valid until a call to<i><a href="setlocale.html">setlocale()</a></i>that modifies the category LC_CTYPE.</blockquote><h4><a name = "tag_000_010_725"> </a>RETURN VALUE</h4><blockquote>The<i>wctype()</i>function returns 0 if the given character class name is not validfor the current locale (category LC_CTYPE),otherwise it returns an object of type<b>wctype_t</b>that can be used in calls to<i><a href="iswctype.html">iswctype()</a></i>.</blockquote><h4><a name = "tag_000_010_726"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_010_727"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_728"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_729"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_730"> </a>SEE ALSO</h4><blockquote><i><a href="iswctype.html">iswctype()</a></i>,<i><a href="wctype.h.html"><wctype.h></a></i>,<i><a href="wchar.h.html"><wchar.h></a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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