mirror of
https://github.com/php/doc-zh.git
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mowangjuanzi
105 lines
3.0 KiB
XML
105 lines
3.0 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: c7e83fbbbcde9f54affc09424d032c38492a3ff4 Maintainer: Jerry Status: ready -->
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<!-- CREDITS: mowangjuanzi -->
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<refentry xml:id="function.bccomp" xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refnamediv>
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<refname>bccomp</refname>
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<refpurpose>比较两个任意精度的数字</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>int</type><methodname>bccomp</methodname>
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<methodparam><type>string</type><parameter>num1</parameter></methodparam>
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<methodparam><type>string</type><parameter>num2</parameter></methodparam>
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<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>scale</parameter><initializer>&null;</initializer></methodparam>
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</methodsynopsis>
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<para>
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将 <parameter>num1</parameter> 与 <parameter>num2</parameter> 进行比较，并返回整型数字的比较结果。
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</para>
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</refsect1>
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<refsect1 role="parameters">
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcadd')/db:refsect1[@role='parameters']/*)" />
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<simpara>
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如果所有的操作数相等返回 <literal>0</literal>；如果 <parameter>num1</parameter> 大于
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<parameter>num2</parameter> 时返回 <literal>1</literal>，否则返回 <literal>-1</literal>。
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</simpara>
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</refsect1>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('function.bcadd')/db:refsect1[@role='errors'])" />
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<refsect1 role="changelog">
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&reftitle.changelog;
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>8.0.0</entry>
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<entry>
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现在 <parameter>scale</parameter> 可以为 null。
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<example>
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<title><function>bccomp</function> 示例</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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echo bccomp('1', '2') . "\n"; // -1
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echo bccomp('1.00001', '1', 3); // 0
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echo bccomp('1.00001', '1', 5); // 1
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?>
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]]>
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</programlisting>
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</example>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<simplelist>
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<member><methodname>BcMath\Number::compare</methodname></member>
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</simplelist>
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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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