125 lines
4.3 KiB
HTML
125 lines
4.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>toupper</title>
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</head>
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<body bgcolor="white">
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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</script>
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<basefont size="3"> <a name="toupper"></a> <a name="tag_03_785"></a><!-- toupper -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_785_01"></a>NAME</h4>
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<blockquote>toupper - transliterate lowercase characters to uppercase</blockquote>
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<h4><a name="tag_03_785_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/ctype.h.html">ctype.h</a>><br>
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<br>
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int toupper(int</tt> <i>c</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_785_03"></a>DESCRIPTION</h4>
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<blockquote>
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<div class="box"><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]"
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border="0"> The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the
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requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to
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the ISO C standard. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></div>
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<p>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>
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or the value of EOF. If the argument has any other value, the behavior is undefined. If the argument of <i>toupper</i>() represents
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a lowercase letter, and there exists a corresponding uppercase letter <sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img
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src="../images/opt-start.gif" alt="[Option Start]" border="0"> (as defined by character type information in the program
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locale category <i>LC_CTYPE ),</i> <img src="../images/opt-end.gif" alt="[Option End]" border="0"> the result shall be the
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corresponding uppercase letter. All other arguments in the domain are returned unchanged.</p>
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</blockquote>
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<h4><a name="tag_03_785_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, <i>toupper</i>() shall return the uppercase letter corresponding to the argument passed.</p>
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</blockquote>
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<h4><a name="tag_03_785_05"></a>ERRORS</h4>
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<blockquote>
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<p>No errors are defined.</p>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_785_06"></a>EXAMPLES</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_785_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_785_08"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_785_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_785_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="setlocale.html"><i>setlocale</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/xbd_chap07.html">Chapter 7, Locale</a>, <a href="../basedefs/ctype.h.html"><i><ctype.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_785_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 1. Derived from Issue 1 of the SVID.</p>
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</blockquote>
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<h4><a name="tag_03_785_12"></a>Issue 6</h4>
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<blockquote>
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<p>Extensions beyond the ISO C standard are marked.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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UNIX ® is a registered Trademark of The Open Group.<br>
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POSIX ® is a registered Trademark of The IEEE.<br>
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"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
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