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104 lines
5.8 KiB
HTML
104 lines
5.8 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>对除法结果取整</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.intdiv" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">intdiv</h1>
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<p class="verinfo">(PHP 7)</p><p class="refpurpose"><span class="refname">intdiv</span> — <span class="dc-title">对除法结果取整</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.intdiv-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>intdiv</strong></span>
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( <span class="methodparam"><span class="type">int</span> <code class="parameter">$dividend</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$divisor</code></span>
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) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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返回 <code class="parameter">dividend</code> 除以 <code class="parameter">divisor</code> 商数的整数部分。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.intdiv-parameters">
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<h3 class="title">参数</h3>
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<dl>
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<dt>
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<code class="parameter">dividend</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">divisor</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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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.intdiv-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">dividend</code> 除以 <code class="parameter">divisor</code> 的商，对该商取整。
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</p>
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</div>
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<div class="refsect1 errors" id="refsect1-function.intdiv-errors">
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<h3 class="title">错误／异常</h3>
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<p class="para">
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如果 <code class="parameter">divisor</code> 是 <em>0</em>，将抛出 <strong class="classname">DivisionByZeroError</strong> 异常。
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如果 <code class="parameter">dividend</code> 是 <strong><code>PHP_INT_MIN</code></strong>
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并且 <code class="parameter">divisor</code> 是 <em>-1</em>，将抛出 <strong class="classname">ArithmeticError</strong> 异常.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.intdiv-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-4130">
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<p><strong>Example #1 <span class="function"><strong>intdiv()</strong></span> 的一些例子</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 />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">intdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">3</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">intdiv</span><span style="color: #007700">(-</span><span style="color: #0000BB">3</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">intdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">3</span><span style="color: #007700">, -</span><span style="color: #0000BB">2</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">intdiv</span><span style="color: #007700">(-</span><span style="color: #0000BB">3</span><span style="color: #007700">, -</span><span style="color: #0000BB">2</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">intdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">PHP_INT_MAX</span><span style="color: #007700">, </span><span style="color: #0000BB">PHP_INT_MAX</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">intdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">PHP_INT_MIN</span><span style="color: #007700">, </span><span style="color: #0000BB">PHP_INT_MIN</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">intdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">PHP_INT_MIN</span><span style="color: #007700">, -</span><span style="color: #0000BB">1</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">intdiv</span><span style="color: #007700">(</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">));<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 class="example-contents screen">
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<div class="cdata"><pre>
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int(1)
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int(-1)
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int(-1)
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int(1)
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int(1)
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int(1)
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Fatal error: Uncaught ArithmeticError: Division of PHP_INT_MIN by -1 is not an integer in %s on line 8
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Fatal error: Uncaught DivisionByZeroError: Division by zero in %s on line 9
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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> |