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魔王卷子
77 lines
2.0 KiB
XML
77 lines
2.0 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 6406cc6c50f8f66f7d55f550dc1ec2759e2eca0f Maintainer: dallas Status: ready -->
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<!-- CREDITS: mowangjuanzi -->
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<refentry xml:id='function.hypot' xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>hypot</refname>
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<refpurpose>
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计算直角三角形的斜边长度
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</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>hypot</methodname>
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<methodparam><type>float</type><parameter>x</parameter></methodparam>
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<methodparam><type>float</type><parameter>y</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>hypot</function> 函数将会根据直角三角形的两直角边长度
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<parameter>x</parameter> 和 <parameter>y</parameter> 计算其斜边的长度。或者是坐标点
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（<parameter>x</parameter>, <parameter>y</parameter>）到原点的距离。该函数的算法等同于
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<code>sqrt($x*$x + $y*$y)</code>。
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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>x</parameter></term>
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<listitem>
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<para>
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第一条边的长度
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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>y</parameter></term>
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<listitem>
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<para>
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第二条边的长度
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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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计算斜边的长度
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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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