📄 toupper.html

📁 unix 下的C开发手册,还用详细的例程。
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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>toupper</title></head><body bgcolor=white><center><font size=2>The Single UNIX &reg; Specification, Version 2<br>Copyright &copy; 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_010_118">&nbsp;</a>NAME</h4><blockquote>toupper - transliterate lower-case characters to upper-case</blockquote><h4><a name = "tag_000_010_119">&nbsp;</a>SYNOPSIS</h4><blockquote><pre><code>#include &lt;<a href="ctype.h.html">ctype.h</a>&gt;int toupper(int <i>c</i>);</code></pre></blockquote><h4><a name = "tag_000_010_120">&nbsp;</a>DESCRIPTION</h4><blockquote>The<i>toupper()</i>function has as a domain a type<b>int</b>,the value of which is representable as an<b>unsigned char</b>or the value of EOF.If the argument has any other value, the behaviour is undefined.If the argument of<i>toupper()</i>represents a lower-case letter,and there exists a corresponding upper-case letter(as defined by character type information in the program localecategory LC_CTYPE),the result is the corresponding upper-case letter.All other arguments in the domain arereturned unchanged.</blockquote><h4><a name = "tag_000_010_121">&nbsp;</a>RETURN VALUE</h4><blockquote>On successful completion,<i>toupper()</i>returns the upper-case letter corresponding to the argument passed.</blockquote><h4><a name = "tag_000_010_122">&nbsp;</a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_010_123">&nbsp;</a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_124">&nbsp;</a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_125">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_010_126">&nbsp;</a>SEE ALSO</h4><blockquote><i><a href="setlocale.html">setlocale()</a></i>,<i><a href="ctype.h.html">&lt;ctype.h&gt;</a></i>,the <b>XBD</b> specification, <a href="../xbd/locale.html"><b>Locale</b>&nbsp;</a>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from Issue 1 of the SVID.</blockquote><hr size=2 noshade><center><font size=2>UNIX &reg; is a registered Trademark of The Open Group.<br>Copyright &copy; 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>
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