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98 lines
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98 lines
3.7 KiB
HTML
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<a name="rint"></a>
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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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<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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