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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta name="generator" content="HTML Tidy, see www.w3.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 --><!-- Copyright (c) 2001-2003 The Open Group, All Rights Reserved --><title>remainder</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="remainder"></a> <a name="tag_03_604"></a><!-- remainder --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2003 Edition<br>Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_03_604_01"></a>NAME</h4><blockquote>remainder, remainderf, remainderl - remainder function</blockquote><h4><a name="tag_03_604_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><p><code><tt>#include <<a href="../basedefs/math.h.html">math.h</a>><br><br> double remainder(double</tt> <i>x</i><tt>, double</tt> <i>y</i><tt>);<br> float remainderf(float</tt> <i>x</i><tt>, float</tt> <i>y</i><tt>);<br> long double remainderl(long double</tt> <i>x</i><tt>, long double</tt> <i>y</i><tt>);<br></tt></code></p></blockquote><h4><a name="tag_03_604_03"></a>DESCRIPTION</h4><blockquote><div class="box"><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]"border="0"> The functionality described on this reference page is aligned with the ISO C standard. Any conflict between therequirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers tothe ISO C standard. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></div><p>These functions shall return the floating-point remainder <i>r</i>= <i>x</i>- <i>ny</i> when <i>y</i> is non-zero. The value<i>n</i> is the integral value nearest the exact value <i>x</i>/ <i>y</i>. When |<i>n</i>-<i>x</i>/<i>y</i>|=½, the value<i>n</i> is chosen to be even.</p><p>The behavior of <i>remainder</i>() shall be independent of the rounding mode.</p></blockquote><h4><a name="tag_03_604_04"></a>RETURN VALUE</h4><blockquote><p>Upon successful completion, these functions shall return the floating-point remainder <i>r</i>= <i>x</i>- <i>ny</i> when<i>y</i> is non-zero.</p><p><sup>[<a href="javascript:open_code('MX')">MX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> If<i>x</i> or <i>y</i> is NaN, a NaN shall be returned.</p><p>If <i>x</i> is infinite or <i>y</i> is 0 and the other is non-NaN, a domain error shall occur, and either a NaN (if supported),or an implementation-defined value shall be returned. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></p></blockquote><h4><a name="tag_03_604_05"></a>ERRORS</h4><blockquote><p>These functions shall fail if:</p><dl compact><dt>Domain Error</dt><dd><sup>[<a href="javascript:open_code('MX')">MX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0">The <i>x</i> argument is ±Inf, or the <i>y</i> argument is ±0 and the other argument is non-NaN. <p>If the integer expression (math_errhandling & MATH_ERRNO) is non-zero, then <i>errno</i> shall be set to [EDOM]. If theinteger expression (math_errhandling & MATH_ERREXCEPT) is non-zero, then the invalid floating-point exception shall be raised.<img src="../images/opt-end.gif" alt="[Option End]" border="0"></p></dd></dl></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_604_06"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_604_07"></a>APPLICATION USAGE</h4><blockquote><p>On error, the expressions (math_errhandling & MATH_ERRNO) and (math_errhandling & MATH_ERREXCEPT) are independent ofeach other, but at least one of them must be non-zero.</p></blockquote><h4><a name="tag_03_604_08"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_604_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_604_10"></a>SEE ALSO</h4><blockquote><p><a href="abs.html"><i>abs</i>()</a> , <a href="div.html"><i>div</i>()</a> , <a href="feclearexcept.html"><i>feclearexcept</i>()</a> , <a href="fetestexcept.html"><i>fetestexcept</i>()</a> , <a href="ldiv.html"><i>ldiv</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap04.html#tag_04_18">Section 4.18, Treatment of Error Conditions for Mathematical Functions</a>, <a href="../basedefs/math.h.html"><i><math.h></i></a></p></blockquote><h4><a name="tag_03_604_11"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 4, Version 2.</p></blockquote><h4><a name="tag_03_604_12"></a>Issue 5</h4><blockquote><p>Moved from X/OPEN UNIX extension to BASE.</p></blockquote><h4><a name="tag_03_604_13"></a>Issue 6</h4><blockquote><p>The <i>remainder</i>() function is no longer marked as an extension.</p><p>The <i>remainderf</i>() and <i>remainderl</i>() functions are added for alignment with the ISO/IEC 9899:1999 standard.</p><p>The DESCRIPTION, RETURN VALUE, ERRORS, and APPLICATION USAGE sections are revised to align with the ISO/IEC 9899:1999standard.</p><p>IEC 60559:1989 standard floating-point extensions over the ISO/IEC 9899:1999 standard are marked.</p></blockquote><div class="box"><em>End of informative text.</em></div><hr><hr size="2" noshade><center><font size="2"><!--footer start-->UNIX ® is a registered Trademark of The Open Group.<br>POSIX ® is a registered Trademark of The IEEE.<br>[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href="../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>]</font></center><!--footer end--><hr size="2" noshade></body></html>⌨️ 快捷键说明
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