111 lines
5.5 KiB
HTML
111 lines
5.5 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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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>std::ios_base::openmode</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_io_ios_base_openmode 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::ios_base::</span>openmode</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-io.html">io</a>‎ | <a href="cpp-io-ios_base.html">ios base</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">typedef</span> <span class="coMULTI">/*implementation defined*/</span> openmode<span class="sy4">;</span></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">static</span> <span class="kw4">constexpr</span> openmode app <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span><br /></span>
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<p><span class="kw4">static</span> <span class="kw4">constexpr</span> openmode binary <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span><br />
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<span class="kw4">static</span> <span class="kw4">constexpr</span> openmode in <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span><br />
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<span class="kw4">static</span> <span class="kw4">constexpr</span> openmode out <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span><br />
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<span class="kw4">static</span> <span class="kw4">constexpr</span> openmode trunc <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span><br /></p>
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<span class="kw4">static</span> <span class="kw4">constexpr</span> openmode ate <span class="sy1">=</span> <span class="coMULTI">/*implementation defined*/</span></div>
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<td></td>
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<td></td>
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<p>指定可用的文件打开标志。它是<a href="cpp-named_req-BitmaskType.html"><span style="font-style:italic">位掩码类型</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(BitmaskType)</span></a> ，下列常量得到定义：</p>
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<td>常量</td>
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<td>解释</td>
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</tr>
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<td><strong class="selflink"><tt>app</tt></strong></td>
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<td>每次写入前寻位到流结尾</td>
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<td><strong class="selflink"><tt>binary</tt></strong></td>
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<td>以<a href="cpp-io-c-FILE.html#.E4.BA.8C.E8.BF.9B.E5.88.B6.E4.B8.8E.E6.96.87.E6.9C.AC.E6.A8.A1.E5.BC.8F">二进制模式</a>打开</td>
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<td><strong class="selflink"><tt>in</tt></strong></td>
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<td>为读打开</td>
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<td><strong class="selflink"><tt>out</tt></strong></td>
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<td>为写打开</td>
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<td><strong class="selflink"><tt>trunc</tt></strong></td>
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<td>在打开时舍弃流的内容</td>
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<td><strong class="selflink"><tt>ate</tt></strong></td>
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<td>打开后立即寻位到流结尾</td>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<td class="mbox-text" style="">本节未完成<br />
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原因：暂无示例</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div class="t-dsc-member-div">
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<div><a href="cpp-io-basic_filebuf-open.html"><span class="t-lines"><span>open</span></span></a></div>
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</div>
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</td>
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<td>打开文件并配置它为关联字符序列<br />
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<span class="t-mark">(<code>std::basic_filebuf<CharT,Traits></code> 的公开成员函数)</span></td>
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
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<div><a href="cpp-io-basic_stringbuf-basic_stringbuf.html"><span class="t-lines"><span>(构造函数)</span></span></a></div>
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</div>
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</td>
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<td>构造一个 basic_stringbuf 对象<br />
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<span class="t-mark">(<code>std::basic_stringbuf<CharT,Traits,Allocator></code> 的公开成员函数)</span></td>
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