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105 lines
4.2 KiB
HTML
105 lines
4.2 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>2个任意精度数字的加法计算</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.bcadd" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">bcadd</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">bcadd</span> — <span class="dc-title">2个任意精度数字的加法计算</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.bcadd-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>bcadd</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$left_operand</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$right_operand</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$scale</code></span>
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] ) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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<code class="parameter">左操作数</code>和<code class="parameter">右操作数</code>求和
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.bcadd-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">left_operand</code></dt>
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<dd>
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<p class="para">
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左操作数，字符串类型
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</p>
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</dd>
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<dt>
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<code class="parameter">right_operand</code></dt>
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<dd>
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<p class="para">
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右操作数，字符串类型
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</p>
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</dd>
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<dt>
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<code class="parameter">
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scale</code></dt>
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<dd>
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<p class="para">此可选参数用于设置结果中小数点后的小数位数。也可通过使用
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<span class="function"><a href="bcscale.html" class="function">bcscale()</a></span> 来设置全局默认的小数位数，用于所有函数。
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</p></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.bcadd-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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2个操作数求和之后的结果以字符串返回
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.bcadd-examples">
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<h3 class="title">范例</h3>
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<div class="example" id="example-4051">
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<p><strong>Example #1 <span class="function"><strong>bcadd()</strong></span> 示例</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 /><br />$a </span><span style="color: #007700">= </span><span style="color: #DD0000">'1.234'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$b </span><span style="color: #007700">= </span><span style="color: #DD0000">'5'</span><span style="color: #007700">;<br /><br />echo </span><span style="color: #0000BB">bcadd</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">); </span><span style="color: #FF8000">// 6<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">bcadd</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">); </span><span style="color: #FF8000">// 6.2340<br /><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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</div>
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<div class="refsect1 seealso" id="refsect1-function.bcadd-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="bcsub.html" class="function" rel="rdfs-seeAlso">bcsub()</a> - 2个任意精度数字的减法</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |