129 lines
6.9 KiB
HTML
129 lines
6.9 KiB
HTML
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<title>标准库头文件 <iostream></title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">标准库头文件</span> <iostream></h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-header.html">header</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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<p>此头文件是<a href="cpp-io.html">输入/输出</a>库的一部分。</p>
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<p>包含 <code><iostream></code> 表现为如同它定义一个 <span class="t-lc"><a href="cpp-io-ios_base-Init.html">std::ios_base::Init</a></span> 类型的静态存储期对象：若它是首个要被构造的 <code>std::ios_base::Init</code> 对象，则其构造函数初始化各个标准流对象，而若它是最后被销毁的 <code>std::ios_base::Init</code> 对象，则其析构函数将会冲洗这些对象（除了 <code>cin</code> 和 <code>wcin</code>）。</p>
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<h3><span class="mw-headline" id=".E5.8C.85.E5.90.AB">包含</span></h3>
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<div><a href="cpp-header-ios.html"><span class="t-lines"><span><ios></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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<td><span class="t-lc"><a href="cpp-io-ios_base.html">std::ios_base</a></span> 类、 <span class="t-lc"><a href="cpp-io-basic_ios.html">std::basic_ios</a></span> 类模板与数个 typedef</td>
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<div><a href="cpp-header-streambuf.html"><span class="t-lines"><span><streambuf></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</td>
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<td><span class="t-lc"><a href="cpp-io-basic_streambuf.html">std::basic_streambuf</a></span> 类模板</td>
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<div><a href="cpp-header-istream.html"><span class="t-lines"><span><istream></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td><span class="t-lc"><a href="cpp-io-basic_istream.html">std::basic_istream</a></span> 类模板与数个 typedef</td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-header-ostream.html"><span class="t-lines"><span><ostream></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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<td><span class="t-lc"><a href="cpp-io-basic_ostream.html">std::basic_ostream</a></span> 、 <span class="t-lc"><a href="cpp-io-basic_iostream.html">std::basic_iostream</a></span> 类模板与数个 typedef</td>
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<h3><span class="mw-headline" id=".E5.AF.B9.E8.B1.A1">对象</span></h3>
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<div><a href="cpp-io-cin.html"><span class="t-lines"><span>cin</span><span>wcin</span></span></a></div>
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</div>
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</td>
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<td>从标准 C 输入流 <span class="t-lc"><a href="cpp-io-c.html">stdin</a></span> 中读取<br />
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<span class="t-mark">(全局对象)</span></td>
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<div><a href="cpp-io-cout.html"><span class="t-lines"><span>cout</span><span>wcout</span></span></a></div>
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</td>
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<td>写入到标准 C 输出流 <span class="t-lc"><a href="cpp-io-c.html">stdout</a></span><br />
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<span class="t-mark">(全局对象)</span></td>
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<div><a href="cpp-io-cerr.html"><span class="t-lines"><span>cerr</span><span>wcerr</span></span></a></div>
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</td>
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<td>写入到标准 C 错误流 <span class="t-lc"><a href="cpp-io-c.html">stderr</a></span>， 无缓冲<br />
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<span class="t-mark">(全局对象)</span></td>
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<div><a href="cpp-io-clog.html"><span class="t-lines"><span>clog</span><span>wclog</span></span></a></div>
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</td>
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<td>写入到标准 C 错误流 <span class="t-lc"><a href="cpp-io-c.html">stderr</a></span><br />
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<span class="t-mark">(全局对象)</span></td>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">概要</span></h3>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <ios></span>
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<span class="co2">#include <streambuf></span>
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<span class="co2">#include <istream></span>
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<span class="co2">#include <ostream></span>
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<span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw4">extern</span> istream cin<span class="sy4">;</span>
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<span class="kw4">extern</span> ostream cout<span class="sy4">;</span>
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<span class="kw4">extern</span> ostream cerr<span class="sy4">;</span>
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<span class="kw4">extern</span> ostream clog<span class="sy4">;</span>
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<span class="kw4">extern</span> wistream wcin<span class="sy4">;</span>
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<span class="kw4">extern</span> wostream wcout<span class="sy4">;</span>
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<span class="kw4">extern</span> wostream wcerr<span class="sy4">;</span>
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<span class="kw4">extern</span> wostream wclog<span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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