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98 lines
3.7 KiB
HTML
98 lines
3.7 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>rint (LIBM)</title>
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<meta name="description" content="rint (LIBM)">
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<meta name="keywords" content="rint (LIBM)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Math.html#Math" rel="up" title="Math">
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<link href="round.html#round" rel="next" title="round">
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<link href="remquo.html#remquo" rel="prev" title="remquo">
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<style type="text/css">
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</head>
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<body lang="en">
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<a name="rint"></a>
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<div class="header">
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<p>
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Next: <a href="round.html#round" accesskey="n" rel="next">round</a>, Previous: <a href="remquo.html#remquo" accesskey="p" rel="prev">remquo</a>, Up: <a href="Math.html#Math" accesskey="u" rel="up">Math</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="rint_002c-rintf_002d_002d_002dround-to-integer"></a>
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<h3 class="section">1.49 <code>rint</code>, <code>rintf</code>—round to integer</h3>
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<a name="index-rint"></a>
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<a name="index-rintf"></a>
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<p><strong>Synopsis</strong>
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</p><div class="example">
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<pre class="example">#include <math.h>
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double rint(double <var>x</var>);
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float rintf(float <var>x</var>);
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</pre></div>
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<p><strong>Description</strong><br>
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The <code>rint</code> functions round their argument to an integer value in
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floating-point format, using the current rounding direction. They
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raise the "inexact" floating-point exception if the result differs
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in value from the argument. See the <code>nearbyint</code> functions for the
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same function with the "inexact" floating-point exception never being
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raised. Newlib does not directly support floating-point exceptions.
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The <code>rint</code> functions are written so that the "inexact" exception is
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raised in hardware implementations that support it, even though Newlib
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does not provide access.
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</p>
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<br>
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<p><strong>Returns</strong><br>
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<var>x</var> rounded to an integral value, using the current rounding direction.
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</p>
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<br>
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<p><strong>Portability</strong><br>
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ANSI C, POSIX
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</p>
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<br>
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<p><strong>See Also</strong><br>
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<code>nearbyint</code>, <code>round</code>
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</p>
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<br>
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</body>
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</html>
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