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105 lines
2.9 KiB
XML
105 lines
2.9 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 761d72245071f89a626903c9bcdc6aaff1252d54 Maintainer: dallas Status: ready -->
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<!-- CREDITS: mowangjuanzi, Luffy -->
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<refentry xml:id="function.fmod" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>fmod</refname>
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<refpurpose>返回除法的浮点数余数</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>float</type><methodname>fmod</methodname>
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<methodparam><type>float</type><parameter>num1</parameter></methodparam>
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<methodparam><type>float</type><parameter>num2</parameter></methodparam>
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</methodsynopsis>
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<para>
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返回被除数（<parameter>num1</parameter>）除以除数（<parameter>num2</parameter>）所得的浮点数余数。余数（<varname>r</varname>）的定义是：num1
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= i * num2 + r，其中 <varname>i</varname> 是整数。如果 <parameter>num2</parameter>
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是非零值，则 <varname>r</varname> 和
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<parameter>num1</parameter> 的符号相同并且其数量值小于
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<parameter>num2</parameter>。
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>num1</parameter></term>
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<listitem>
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<para>
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被除数
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>num2</parameter></term>
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<listitem>
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<para>
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除数
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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<parameter>num1</parameter>/<parameter>num2</parameter> 的浮点数余数。
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title><function>fmod</function> 的使用</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$x = 5.7;
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$y = 1.3;
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$r = fmod($x, $y);
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// $r equals 0.5, because 4 * 1.3 + 0.5 = 5.7
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var_dump($x, $y, $r);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><link linkend="language.operators.arithmetic"><literal>/</literal></link>——浮点除法</member>
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<member><link linkend="language.operators.arithmetic"><literal>%</literal></link>——整数取模</member>
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<member><function>intdiv</function>——整数除法</member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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