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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>towlower</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_136"> </a>NAME</h4><blockquote>towlower - transliterate upper-case wide-character code to lower-case</blockquote><h4><a name = "tag_000_010_137"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="wctype.h.html">wctype.h</a>>wint_t towlower(wint_t <i>wc</i>);</code></pre></blockquote><h4><a name = "tag_000_010_138"> </a>DESCRIPTION</h4><blockquote>The<i>towlower()</i>function has as a domain a type<b>wint_t</b>,the value of which must be a character representable as a<b>wchar_t</b>,and must be a wide-character code corresponding to a valid character in thecurrent locale or the value of WEOF.If the argument has any other value, the behaviour is undefined.If the argument of<i>towlower()</i>represents an upper-case wide-character code,and there exists a corresponding lower-case wide-character code(as defined by character type information in the program localecategory LC_CTYPE), the result is the correspondinglower-case wide-character code.All other arguments in the domain are returned unchanged.</blockquote><h4><a name = "tag_000_010_139"> </a>RETURN VALUE</h4><blockquote>On successful completion,<i>towlower()</i>returns the lower-case letter corresponding to the argument passed; otherwiseit returns the argument unchanged.</blockquote><h4><a name = "tag_000_010_140"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_010_141"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_142"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_143"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_144"> </a>SEE ALSO</h4><blockquote><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>,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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