121 lines
6.6 KiB
HTML
121 lines
6.6 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>std::money_base</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_locale_money_base skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>money_base</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-locale.html">locale</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<div>定义于头文件 <code><a href="cpp-header-locale.html"><locale></a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> money_base<span class="sy4">;</span></span></div>
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<p>类 <span class="t-lc"><strong class="selflink">std::money_base</strong></span> 提供为 <span class="t-lc"><a href="cpp-locale-moneypunct.html">std::moneypunct</a></span> 、 <span class="t-lc"><a href="cpp-locale-money_get.html">std::money_get</a></span> 和 <span class="t-lc"><a href="cpp-locale-money_put.html">std::money_put</a></span> 平面所继承并使用的常量。</p>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E7.B1.BB.E5.9E.8B">成员类型</span></h3>
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<td>成员类型</td>
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<td>定义</td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">enum</span> part <span class="br0">{</span> none, space, symbol, sign, value <span class="br0">}</span><span class="sy4">;</span></span></span></td>
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<td>无作用域枚举类型</td>
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<tr class="t-dsc">
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">struct</span> pattern <span class="br0">{</span> <span class="kw4">char</span> field<span class="br0">[</span><span class="nu0">4</span><span class="br0">]</span><span class="sy4">;</span> <span class="br0">}</span><span class="sy4">;</span></span></span></td>
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<td>货币格式类型</td>
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<table class="t-dsc-begin">
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<td>枚举常量</td>
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<td>解释</td>
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<tr class="t-dsc">
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<td><code>none</code></td>
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<td>容许但不要求空白符，除了在末位置不容许空白符</td>
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</tr>
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<tr class="t-dsc">
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<td><code>space</code></td>
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<td>要求一或多个空白字符</td>
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<tr class="t-dsc">
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<td><code>symbol</code></td>
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<td>要求 moneypunct::curr_symbol 所返回的字符序列</td>
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</tr>
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<tr class="t-dsc">
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<td><code>sign</code></td>
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<td>要求 moneypunct::positive_sign 或 moneypunct::negative_sign 所返回的首个字符</td>
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<td><code>value</code></td>
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<td>要求绝对数值货币值</td>
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</table>
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<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">注意</span></h3>
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<p>货币格式是四个可转换为 <span class="t-lc"><strong class="selflink">std::money_base::part</strong></span> 的 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char</span></span></span> 的数组。该序列中， <code>symbol</code> 、 <code>sign</code> 和 <code>value</code> 的每一个准确出现一次，而 <code>space</code> 或 <code>none</code> 出现于剩余位置。 <code>none</code> 的值若存在，则不在首位； <code>space</code> 的值若存在，则不在首位或末位。</p>
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<p><span class="t-lc"><a href="cpp-locale-moneypunct.html">std::moneypunct</a></span> 的标准特化所返回的默认格式为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="br0">{</span>symbol, sign, none, value<span class="br0">}</span></span></span> 。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<table class="t-dsc-begin">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-locale-moneypunct.html"><span class="t-lines"><span>moneypunct</span></span></a></div>
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</div>
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</td>
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<td>定义 <span class="t-lc"><a href="cpp-locale-money_get.html">std::money_get</a></span> 与 <span class="t-lc"><a href="cpp-locale-money_put.html">std::money_put</a></span> 所用的货币格式解析器的参数<br />
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<span class="t-mark">(类模板)</span></td>
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<tr class="t-dsc">
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<div class="t-dsc-member-div">
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<div><a href="cpp-locale-money_get.html"><span class="t-lines"><span>money_get</span></span></a></div>
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</div>
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</td>
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<td>从输入字符序列中解析并构造货币值<br />
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<span class="t-mark">(类模板)</span></td>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-locale-money_put.html"><span class="t-lines"><span>money_put</span></span></a></div>
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</div>
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</td>
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<td>格式化货币值为字符序列以输出<br />
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<span class="t-mark">(类模板)</span></td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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