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88 lines
3.7 KiB
HTML
88 lines
3.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>返回除法的浮点数余数</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.fmod" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">fmod</h1>
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<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">fmod</span> — <span class="dc-title">返回除法的浮点数余数</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.fmod-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>fmod</strong></span>
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( <span class="methodparam"><span class="type">float</span> <code class="parameter">$x</code></span>
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, <span class="methodparam"><span class="type">float</span> <code class="parameter">$y</code></span>
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) : <span class="type">float</span></div>
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<p class="para rdfs-comment">
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返回被除数（<code class="parameter">x</code>）除以除数（<code class="parameter">y</code>）所得的浮点数余数。余数（<var class="varname"><var class="varname">r</var></var>）的定义是：x
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= i * y + r，其中 <var class="varname"><var class="varname">i</var></var> 是整数。如果 <code class="parameter">y</code>
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是非零值，则 <var class="varname"><var class="varname">r</var></var> 和
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<code class="parameter">x</code> 的符号相同并且其数量值小于
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<code class="parameter">y</code>。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.fmod-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">x</code></dt>
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<dd>
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<p class="para">
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被除数
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</p>
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</dd>
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<dt>
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<code class="parameter">y</code></dt>
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<dd>
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<p class="para">
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除数
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.fmod-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<code class="parameter">x</code>/<code class="parameter">y</code>的浮点数余数。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.fmod-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-4128">
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<p><strong>Example #1 <span class="function"><strong>fmod()</strong></span> 的使用</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$x </span><span style="color: #007700">= </span><span style="color: #0000BB">5.7</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$y </span><span style="color: #007700">= </span><span style="color: #0000BB">1.3</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$r </span><span style="color: #007700">= </span><span style="color: #0000BB">fmod</span><span style="color: #007700">(</span><span style="color: #0000BB">$x</span><span style="color: #007700">, </span><span style="color: #0000BB">$y</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// $r equals 0.5, because 4 * 1.3 + 0.5 = 5.7<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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</div></div></div></body></html> |