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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>inserter</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-iterator.html">iterator</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-iterator.html">&lt;iterator&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Container <span class="sy1">&gt;</span><br /></span>
<p><a href="cpp-iterator-insert_iterator.html"><span class="kw662">std::<span class="me2">insert_iterator</span></span></a><span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span><br /></p>
&nbsp; &nbsp; inserter<span class="br0">(</span> Container<span class="sy3">&amp;</span> c, <span class="kw1">typename</span> Container<span class="sy4">::</span><span class="me2">iterator</span> i <span class="br0">)</span><span class="sy4">;</span></div>
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<td><span class="t-mark-rev t-until-cxx20">(C++20 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Container <span class="sy1">&gt;</span><br /></span>
<p><span class="kw4">constexpr</span> <a href="cpp-iterator-insert_iterator.html"><span class="kw662">std::<span class="me2">insert_iterator</span></span></a><span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span><br /></p>
&nbsp; &nbsp; inserter<span class="br0">(</span> Container<span class="sy3">&amp;</span> c, ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span> i <span class="br0">)</span><span class="sy4">;</span></div>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<p><code>inserter</code> &#26159;&#20026;&#23481;&#22120; <code>c</code> &#19982;&#20854;&#36845;&#20195;&#22120; <code>i</code> &#26500;&#36896; <span class="t-lc"><a href="cpp-iterator-insert_iterator.html">std::insert_iterator</a></span> &#30340;&#20415;&#21033;&#20989;&#25968;&#27169;&#26495;&#65292;&#25317;&#26377;&#20174;&#21442;&#25968;&#31867;&#22411;&#25512;&#23548;&#30340;&#31867;&#22411;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>c</td>
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<td>&#25903;&#25345; <code>insert</code> &#25805;&#20316;&#30340;&#23481;&#22120;</td>
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<td>&#25351;&#31034;&#25554;&#20837;&#20301;&#32622;&#30340; <code>c</code> &#20013;&#36845;&#20195;&#22120;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#33021;&#29992;&#20110;&#22312; <code>i</code> &#25152;&#25351;&#31034;&#20301;&#32622;&#25554;&#20837;&#20803;&#32032;&#21040;&#23481;&#22120; <code>c</code> &#30340; <span class="t-lc"><a href="cpp-iterator-insert_iterator.html">std::insert_iterator</a></span> &#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.AF.E8.83.BD.E7.9A.84.E5.AE.9E.E7.8E.B0">&#21487;&#33021;&#30340;&#23454;&#29616;</span></h3>
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<pre class="de1"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Container <span class="sy1">&gt;</span>
<a href="cpp-iterator-insert_iterator.html"><span class="kw662">std::<span class="me2">insert_iterator</span></span></a><span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span> inserter<span class="br0">(</span> Container<span class="sy3">&amp;</span> c, <span class="kw1">typename</span> Container<span class="sy4">::</span><span class="me2">iterator</span> i <span class="br0">)</span>
<span class="br0">{</span>
<span class="kw1">return</span> <a href="cpp-iterator-insert_iterator.html"><span class="kw662">std::<span class="me2">insert_iterator</span></span></a><span class="sy1">&lt;</span>Container<span class="sy1">&gt;</span><span class="br0">(</span>c, i<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;algorithm&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;iterator&gt;</span>
<span class="co2">#include &lt;vector&gt;</span>
<span class="co2">#include &lt;set&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-container-multiset.html"><span class="kw1278">std::<span class="me2">multiset</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;</span> s <span class="br0">{</span><span class="nu0">1</span>, <span class="nu0">2</span>, <span class="nu0">3</span><span class="br0">}</span><span class="sy4">;</span>
<span class="co1">// std::inserter &#24120;&#29992;&#20110; set</span>
<a href="cpp-algorithm-fill_n.html"><span class="kw1587">std::<span class="me2">fill_n</span></span></a><span class="br0">(</span>std<span class="sy4">::</span><span class="me2">inserter</span><span class="br0">(</span>s, s.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span>, <span class="nu0">5</span>, <span class="nu0">2</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">int</span> n <span class="sy4">:</span> s<span class="br0">)</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> n <span class="sy1">&lt;&lt;</span> <span class="st0">&#39; &#39;</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<a href="cpp-container-vector.html"><span class="kw1268">std::<span class="me2">vector</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;</span> d <span class="br0">{</span><span class="nu0">100</span>, <span class="nu0">200</span>, <span class="nu0">300</span><span class="br0">}</span><span class="sy4">;</span>
<a href="cpp-container-vector.html"><span class="kw1268">std::<span class="me2">vector</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;</span> l <span class="br0">{</span><span class="nu0">1</span>, <span class="nu0">2</span>, <span class="nu0">3</span>, <span class="nu0">4</span>, <span class="nu0">5</span><span class="br0">}</span><span class="sy4">;</span>
<span class="co1">// &#25554;&#20837;&#39034;&#24207;&#23481;&#22120;&#26159;&#65292;&#25554;&#20837;&#28857;&#21069;&#36827;&#65292;&#22240;&#20026;&#27599;&#27425;</span>
<span class="co1">// std::insert_iterator::operator= &#37117;&#26356;&#26032;&#30446;&#26631;&#36845;&#20195;&#22120;</span>
<a href="cpp-algorithm-copy.html"><span class="kw1581">std::<span class="me2">copy</span></span></a><span class="br0">(</span>d.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, d.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>, std<span class="sy4">::</span><span class="me2">inserter</span><span class="br0">(</span>l, <a href="cpp-iterator-next.html"><span class="kw673">std::<span class="me2">next</span></span></a><span class="br0">(</span>l.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">int</span> n <span class="sy4">:</span> l<span class="br0">)</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> n <span class="sy1">&lt;&lt;</span> <span class="st0">&#39; &#39;</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#36755;&#20986;&#65306;</p>
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<pre class="de1">1 2 2 2 2 2 2 3
1 100 200 300 2 3 4 5</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-iterator-insert_iterator.html"><span class="t-lines"><span>insert_iterator</span></span></a></div>
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<td>&#29992;&#20110;&#25554;&#20837;&#23481;&#22120;&#30340;&#36845;&#20195;&#22120;&#36866;&#37197;&#22120;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<div><a href="cpp-iterator-back_inserter.html"><span class="t-lines"><span>back_inserter</span></span></a></div>
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<td>&#21019;&#24314;&#25317;&#26377;&#20174;&#23454;&#21442;&#25512;&#20986;&#30340;&#31867;&#22411;&#30340; <span class="t-lc"><a href="cpp-iterator-back_insert_iterator.html">std::back_insert_iterator</a></span><br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
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<div><a href="cpp-iterator-front_inserter.html"><span class="t-lines"><span>front_inserter</span></span></a></div>
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<td>&#21019;&#24314;&#25317;&#26377;&#20174;&#23454;&#21442;&#25512;&#20986;&#30340;&#31867;&#22411;&#30340; <span class="t-lc"><a href="cpp-iterator-front_insert_iterator.html">std::front_insert_iterator</a></span><br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
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