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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>iswalpha</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_007_143"> </a>NAME</h4><blockquote>iswalpha - test for an alphabetic wide-character code</blockquote><h4><a name = "tag_000_007_144"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="wctype.h.html">wctype.h</a>>int iswalpha(wint_t <i>wc</i>);</code></pre></blockquote><h4><a name = "tag_000_007_145"> </a>DESCRIPTION</h4><blockquote>The<i>iswalpha()</i>function tests whether<i>wc</i>is a wide-character code representinga character of class<b>alpha</b>in the program's current locale, seethe <b>XBD</b> specification, <a href="../xbd/locale.html"><b>Locale</b> </a>.<p>In all cases<i>wc</i>is a<b>wint_t</b>,the value of which must be awide-character code corresponding to a valid character inthe current locale or must equal the value of the macro WEOF.If the argument has any other value, the behaviour is undefined.</blockquote><h4><a name = "tag_000_007_146"> </a>RETURN VALUE</h4><blockquote>The<i>iswalpha()</i>function returns non-zero if<i>wc</i>is an alphabetic wide-character code; otherwise it returns 0.</blockquote><h4><a name = "tag_000_007_147"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_007_148"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_007_149"> </a>APPLICATION USAGE</h4><blockquote>To ensure applications portability,especially across natural languages,only this function and those listed in the SEE ALSO sectionshould be used for classification of wide-character codes.</blockquote><h4><a name = "tag_000_007_150"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_007_151"> </a>SEE ALSO</h4><blockquote><i><a href="iswalnum.html">iswalnum()</a></i>,<i><a href="iswcntrl.html">iswcntrl()</a></i>,<i><a href="iswdigit.html">iswdigit()</a></i>,<i><a href="iswgraph.html">iswgraph()</a></i>,<i><a href="iswlower.html">iswlower()</a></i>,<i><a href="iswprint.html">iswprint()</a></i>,<i><a href="iswpunct.html">iswpunct()</a></i>,<i><a href="iswspace.html">iswspace()</a></i>,<i><a href="iswupper.html">iswupper()</a></i>,<i><a href="iswxdigit.html">iswxdigit()</a></i>,<i><a href="setlocale.html">setlocale()</a></i>,<i><a href="wctype.h.html"><wctype.h></a></i>,<i><a href="wchar.h.html"><wchar.h></a></i>,<i><a href="stdio.h.html"><stdio.h></a></i>,the <b>XBD</b> specification, <a href="../xbd/locale.html"><b>Locale</b> </a>.</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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