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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">&#26631;&#20934;&#24211;&#22836;&#25991;&#20214;</span> &lt;fstream&gt;</h1>
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<p>&#27492;&#22836;&#25991;&#20214;&#26159;<a href="cpp-io.html">&#36755;&#20837;/&#36755;&#20986;</a>&#24211;&#30340;&#19968;&#37096;&#20998;&#12290;</p>
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<h3><span class="mw-headline" id=".E7.B1.BB">&#31867;</span></h3>
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<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_filebuf.html"><span class="t-lines"><span>basic_filebuf</span></span></a></div>
</div>
</td>
<td>&#25277;&#35937;&#21407;&#29983;&#25991;&#20214;&#35774;&#22791;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_ifstream.html"><span class="t-lines"><span>basic_ifstream</span></span></a></div>
</div>
</td>
<td>&#23454;&#29616;&#39640;&#23618;&#25991;&#20214;&#27969;&#36755;&#20837;&#25805;&#20316;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_ofstream.html"><span class="t-lines"><span>basic_ofstream</span></span></a></div>
</div>
</td>
<td>&#23454;&#29616;&#39640;&#23618;&#25991;&#20214;&#27969;&#36755;&#20986;&#25805;&#20316;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_fstream.html"><span class="t-lines"><span>basic_fstream</span></span></a></div>
</div>
</td>
<td>&#23454;&#29616;&#39640;&#23618;&#25991;&#20214;&#27969;&#36755;&#20837;/&#36755;&#20986;&#25805;&#20316;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td><code>filebuf</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_filebuf.html"><span class="kw1667">std::<span class="me2">basic_filebuf</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>wfilebuf</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_filebuf.html"><span class="kw1667">std::<span class="me2">basic_filebuf</span></span></a><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>ifstream</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_ifstream.html"><span class="kw1718">std::<span class="me2">basic_ifstream</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>wifstream</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_ifstream.html"><span class="kw1718">std::<span class="me2">basic_ifstream</span></span></a><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>ofstream</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_ofstream.html"><span class="kw1719">std::<span class="me2">basic_ofstream</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>wofstream</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_ofstream.html"><span class="kw1719">std::<span class="me2">basic_ofstream</span></span></a><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>fstream</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_fstream.html"><span class="kw1720">std::<span class="me2">basic_fstream</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr class="t-dsc">
<td><code>wfstream</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_fstream.html"><span class="kw1720">std::<span class="me2">basic_fstream</span></span></a><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
</tr>
<tr>
<td colspan="2">
<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">&#20989;&#25968;</span></h3>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_filebuf-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_filebuf)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#29305;&#21270; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#31639;&#27861;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_ifstream-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_ifstream)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#29305;&#21270; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#31639;&#27861;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_ofstream-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_ofstream)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#29305;&#21270; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#31639;&#27861;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_fstream-swap2.html"><span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_fstream)</span></span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#29305;&#21270; <span class="t-lc"><a href="cpp-algorithm-swap.html">std::swap</a></span> &#31639;&#27861;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">&#27010;&#35201;</span></h3>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>charT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_filebuf<span class="sy4">;</span>
<span class="kw1">using</span> filebuf <span class="sy1">=</span> basic_filebuf<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wfilebuf <span class="sy1">=</span> basic_filebuf<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>charT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_ifstream<span class="sy4">;</span>
<span class="kw1">using</span> ifstream <span class="sy1">=</span> basic_ifstream<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wifstream <span class="sy1">=</span> basic_ifstream<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>charT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_ofstream<span class="sy4">;</span>
<span class="kw1">using</span> ofstream <span class="sy1">=</span> basic_ofstream<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wofstream <span class="sy1">=</span> basic_ofstream<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> charT, <span class="kw1">class</span> traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>charT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_fstream<span class="sy4">;</span>
<span class="kw1">using</span> fstream <span class="sy1">=</span> basic_fstream<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wfstream <span class="sy1">=</span> basic_fstream<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::basic_filebuf">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-io-basic_filebuf.html">std::basic_filebuf</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_filebuf <span class="sy4">:</span> <span class="kw1">public</span> basic_streambuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;/&#26512;&#26500;&#20989;&#25968;</span>
basic_filebuf<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
basic_filebuf<span class="br0">(</span><span class="kw4">const</span> basic_filebuf<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_filebuf<span class="br0">(</span>basic_filebuf<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">virtual</span> ~basic_filebuf<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;&#19982;&#20132;&#25442;</span>
basic_filebuf<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_filebuf<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_filebuf<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_filebuf<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_filebuf<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25104;&#21592;</span>
<span class="kw4">bool</span> is_open<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
basic_filebuf<span class="sy2">*</span> open<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> s, ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode<span class="br0">)</span><span class="sy4">;</span>
basic_filebuf<span class="sy2">*</span> open<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#20165;&#23485;&#31995;&#32479;</span>
basic_filebuf<span class="sy2">*</span> open<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode<span class="br0">)</span><span class="sy4">;</span>
basic_filebuf<span class="sy2">*</span> open<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode<span class="br0">)</span><span class="sy4">;</span>
basic_filebuf<span class="sy2">*</span> close<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">protected</span><span class="sy4">:</span>
<span class="co1">// &#35206;&#30422;&#30340;&#34394;&#20989;&#25968;</span>
streamsize showmanyc<span class="br0">(</span><span class="br0">)</span> override<span class="sy4">;</span>
int_type underflow<span class="br0">(</span><span class="br0">)</span> override<span class="sy4">;</span>
int_type uflow<span class="br0">(</span><span class="br0">)</span> override<span class="sy4">;</span>
int_type pbackfail<span class="br0">(</span>int_type c <span class="sy1">=</span> Traits<span class="sy4">::</span><span class="me2">eof</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> override<span class="sy4">;</span>
int_type overflow <span class="br0">(</span>int_type c <span class="sy1">=</span> Traits<span class="sy4">::</span><span class="me2">eof</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> override<span class="sy4">;</span>
basic_streambuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy2">*</span> setbuf<span class="br0">(</span>char_type<span class="sy2">*</span> s,
streamsize n<span class="br0">)</span> override<span class="sy4">;</span>
pos_type seekoff<span class="br0">(</span>off_type off, ios_base<span class="sy4">::</span><span class="me2">seekdir</span> way,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> which
<span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span> override<span class="sy4">;</span>
pos_type seekpos<span class="br0">(</span>pos_type sp,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> which
<span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw4">int</span> sync<span class="br0">(</span><span class="br0">)</span> override<span class="sy4">;</span>
<span class="kw4">void</span> imbue<span class="br0">(</span><span class="kw4">const</span> locale<span class="sy3">&amp;</span> loc<span class="br0">)</span> override<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_filebuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
basic_filebuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::basic_ifstream">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-io-basic_ifstream.html">std::basic_ifstream</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_ifstream <span class="sy4">:</span> <span class="kw1">public</span> basic_istream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;</span>
basic_ifstream<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_ifstream<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_ifstream<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span><span class="co1">// &#20165;&#23485;&#31995;&#32479;</span>
<span class="kw1">explicit</span> basic_ifstream<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_ifstream<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span>
basic_ifstream<span class="br0">(</span><span class="kw4">const</span> basic_ifstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_ifstream<span class="br0">(</span>basic_ifstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;&#19982;&#20132;&#25442;</span>
basic_ifstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_ifstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_ifstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_ifstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_ifstream<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25104;&#21592;</span>
basic_filebuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy2">*</span> rdbuf<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">bool</span> is_open<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> s, ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#20165;&#23485;&#31995;&#32479;</span>
<span class="kw4">void</span> open<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> s, ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy3">&amp;</span> s, ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> close<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
basic_filebuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> sb<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_ifstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
basic_ifstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::basic_ofstream">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-io-basic_ofstream.html">std::basic_ofstream</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_ofstream <span class="sy4">:</span> <span class="kw1">public</span> basic_ostream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;</span>
basic_ofstream<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_ofstream<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_ofstream<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> s, <span class="co1">// &#20165;&#23485;&#31995;&#32479;</span>
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_ofstream<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_ofstream<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
basic_ofstream<span class="br0">(</span><span class="kw4">const</span> basic_ofstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_ofstream<span class="br0">(</span>basic_ofstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;&#19982;&#20132;&#25442;</span>
basic_ofstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_ofstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_ofstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_ofstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_ofstream<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25104;&#21592;</span>
basic_filebuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy2">*</span> rdbuf<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">bool</span> is_open<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> s, ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#20165;&#23485;&#31995;&#32479;</span>
<span class="kw4">void</span> open<span class="br0">(</span><span class="kw4">const</span> string<span class="sy3">&amp;</span> s, ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span><span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy3">&amp;</span> s, ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> close<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
basic_filebuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> sb<span class="sy4">;</span> <span class="co1">// &#20165;&#29992;&#20110;&#38416;&#37322;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_ofstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
basic_ofstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::basic_fstream">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-io-basic_fstream.html">std::basic_fstream</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_fstream <span class="sy4">:</span> <span class="kw1">public</span> basic_iostream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="co1">// &#26500;&#36896;&#20989;&#25968;</span>
basic_fstream<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_fstream<span class="br0">(</span>
<span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_fstream<span class="br0">(</span>
<span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#20165;&#23485;&#31995;&#32479;</span>
<span class="kw1">explicit</span> basic_fstream<span class="br0">(</span>
<span class="kw4">const</span> string<span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">explicit</span> basic_fstream<span class="br0">(</span>
<span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
basic_fstream<span class="br0">(</span><span class="kw4">const</span> basic_fstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_fstream<span class="br0">(</span>basic_fstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#36171;&#20540;&#19982;&#20132;&#25442;</span>
basic_fstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_fstream<span class="sy3">&amp;</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
basic_fstream<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_fstream<span class="sy3">&amp;&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_fstream<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25104;&#21592;</span>
basic_filebuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy2">*</span> rdbuf<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">bool</span> is_open<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span>
<span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span>
<span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#20165;&#23485;&#31995;&#32479;</span>
<span class="kw4">void</span> open<span class="br0">(</span>
<span class="kw4">const</span> string<span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> open<span class="br0">(</span>
<span class="kw4">const</span> filesystem<span class="sy4">::</span><span class="me2">path</span><span class="sy3">&amp;</span> s,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> mode <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> close<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">private</span><span class="sy4">:</span>
basic_filebuf<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span> sb<span class="sy4">;</span> <span class="co1">// &#20165;&#23485;&#31995;&#32479;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_fstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> x,
basic_fstream<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> y<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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