114 lines
3.4 KiB
HTML
114 lines
3.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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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><stdbool.h></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="<stdbool.h>"></a> <a name="tag_13_46"></a><!-- <stdbool.h> -->
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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_13_46_01"></a>NAME</h4>
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<blockquote>stdbool.h - boolean type and values</blockquote>
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<h4><a name="tag_13_46_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><tt>#include <stdbool.h></tt></p>
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</blockquote>
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<h4><a name="tag_13_46_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><stdbool.h></i> header shall define the following macros:</p>
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<dl compact>
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<dt>bool</dt>
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<dd>Expands to <b>_Bool</b>.</dd>
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<dt>true</dt>
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<dd>Expands to the integer constant 1.</dd>
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<dt>false</dt>
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<dd>Expands to the integer constant 0.</dd>
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<dt>__bool_true_false_are_defined</dt>
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<dd><br>
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Expands to the integer constant 1.</dd>
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</dl>
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<p>An application may undefine and then possibly redefine the macros bool, true, and false.</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_13_46_04"></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_13_46_05"></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_13_46_06"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>The ability to undefine and redefine the macros bool, true, and false is an obsolescent feature and may be withdrawn in a future
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version.</p>
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</blockquote>
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<h4><a name="tag_13_46_07"></a>SEE ALSO</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_13_46_08"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 6. Included for alignment with the ISO/IEC 9899:1999 standard.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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<center><font size="2"><!--footer start-->
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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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[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
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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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