klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
c6df6d16c8458fe43f1c7d18c2b6098b365641a0
hustoj/web/cppreference-zh/chmhelp/cpp-algorithm-ranges-rotate.html
klarkxy 196e706fe4 上传cppreference
2025-08-01 12:57:54 +08:00

291 lines
30 KiB
HTML
Raw Blame History

<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>std::ranges::rotate</title>
<link rel="stylesheet" href="ext.css" />
<link rel="stylesheet" href="site_modules.css" />
</head>
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_algorithm_ranges_rotate skin-cppreference2 action-view cpp-navbar">
<div id="cpp-content-base">
<div id="content"><a id="top"></a>
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::ranges::</span>rotate</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-algorithm.html">algorithm</a>&lrm; | <a href="cpp-algorithm-ranges.html">ranges</a></span></div>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<table class="t-dcl-begin">
<tbody>
<tr class="t-dsc-header">
<td>
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-algorithm.html">&lt;algorithm&gt;</a></code></div>
</td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl-h">
<td>
<div>&#35843;&#29992;&#31614;&#21517;</div>
</td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl t-since-cxx20">
<td>
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> std<span class="sy4">::</span><span class="me2">permutable</span> I, std<span class="sy4">::</span><span class="me2">sentinel_for</span><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S <span class="sy1">&gt;</span><br /></span>
<p><span class="kw4">constexpr</span> ranges<span class="sy4">::</span><span class="me2">subrange</span><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; rotate<span class="br0">(</span> I first, I middle, S last <span class="br0">)</span><span class="sy4">;</span></div>
</td>
<td>(1)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
</tr>
<tr class="t-dcl t-since-cxx20">
<td>
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> ranges<span class="sy4">::</span><span class="me2">forward_range</span> R <span class="sy1">&gt;</span><br /></span>
<p>requires &nbsp;std<span class="sy4">::</span><span class="me2">permutable</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>R<span class="sy1">&gt;&gt;</span><br />
<span class="kw4">constexpr</span> ranges<span class="sy4">::</span><span class="me2">borrowed_subrange_t</span><span class="sy1">&lt;</span>R<span class="sy1">&gt;</span><br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; rotate<span class="br0">(</span> R<span class="sy3">&amp;&amp;</span> r, ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>R<span class="sy1">&gt;</span> middle <span class="br0">)</span><span class="sy4">;</span></div>
</td>
<td>(2)</td>
<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
</tr>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<div class="t-li1"><span class="t-li">1)</span> &#22312;&#20803;&#32032;&#33539;&#22260;&#19978;&#36827;&#34892;<i>&#24038;&#26059;</i>&#12290;&#20855;&#20307;&#32780;&#35328;&#65292; <code>ranges::rotate</code> &#20132;&#25442;&#33539;&#22260; <code>[first, last)</code> &#20013;&#30340;&#20803;&#32032;&#20351;&#24471;&#20803;&#32032; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>middle</span></span> &#25104;&#20026;&#26032;&#33539;&#22260;&#30340;&#36215;&#22987;&#65292;&#32780; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span><span class="br0">(</span>middle <span class="sy2">-</span> <span class="nu0">1</span><span class="br0">)</span></span></span> &#25104;&#20026;&#26032;&#30340;&#26411;&#20803;&#32032;&#12290;</div>
<div class="t-li1"><span class="t-li"></span> &#33509; <code>[first, last)</code> &#19981;&#26159;&#21512;&#27861;&#33539;&#22260;&#25110; <code>middle</code> &#19981;&#22312; <code>[first, last)</code> &#20013;&#21017;&#34892;&#20026;&#26410;&#23450;&#20041;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#21516; <span class="t-v">(1)</span> &#65292;&#20294;&#20197; <code>r</code> &#20026;&#33539;&#22260;&#65292;&#22914;&#21516;&#20197; <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">begin</span><span class="br0">(</span>r<span class="br0">)</span></span></span> &#20026; <code>first</code> &#24182;&#20197; <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">end</span><span class="br0">(</span>r<span class="br0">)</span></span></span> &#20026; <code>last</code> &#12290;</div>
<p>&#27492;&#39029;&#38754;&#19978;&#25551;&#36848;&#30340;&#20223;&#20989;&#25968;&#23454;&#20307;&#26159; <i>niebloid</i> &#65292;&#21363;&#65306;</p>
<ul>
<li>&#35843;&#29992;&#23427;&#20204;&#20013;&#30340;&#20219;&#20309;&#19968;&#32773;&#26102;&#19981;&#21487;&#25351;&#23450;&#26174;&#24335;&#27169;&#26495;&#23454;&#21442;&#12290;</li>
<li>&#23427;&#20204;&#26080;&#19968;&#23545;<a href="cpp-language-adl.html">&#23454;&#21442;&#20381;&#36182;&#26597;&#25214;</a>&#21487;&#35265;&#12290;</li>
<li>&#22312;<a href="cpp-language-unqualified_lookup.html">&#36890;&#24120;&#26080;&#38480;&#23450;&#26597;&#25214;</a>&#23547;&#25214;&#20989;&#25968;&#35843;&#29992;&#36816;&#31639;&#31526;&#24038;&#20391;&#30340;&#21517;&#31216;&#25214;&#21040;&#23427;&#20204;&#20043;&#19968;&#26102;&#65292;&#23427;&#31105;&#27490;<a href="cpp-language-adl.html">&#23454;&#21442;&#20381;&#36182;&#26597;&#25214;</a>&#12290;</li>
</ul>
<p>&#23454;&#38469;&#19978;&#65292;&#23427;&#20204;&#33021;&#20197;&#20989;&#25968;&#23545;&#35937;&#65292;&#25110;&#20197;&#26576;&#20123;&#29305;&#27530;&#32534;&#35793;&#22120;&#25193;&#23637;&#23454;&#29616;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td>first, last</td>
<td>-</td>
<td>&#35201;&#26059;&#36716;&#30340;&#20803;&#32032;&#33539;&#22260;</td>
</tr>
<tr class="t-par">
<td>r</td>
<td>-</td>
<td>&#35201;&#26059;&#36716;&#30340;&#20803;&#32032;&#33539;&#22260;</td>
</tr>
<tr class="t-par">
<td>middle</td>
<td>-</td>
<td>&#25351;&#21521;&#35201;&#20986;&#29616;&#22312;&#26059;&#36716;&#21518;&#33539;&#22260;&#36215;&#22987;&#30340;&#20803;&#32032;&#30340;&#36845;&#20195;&#22120;</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="br0">{</span>new_first, last<span class="br0">}</span></span></span> &#65292;&#20854;&#20013; <code><i>new_first</i></code> &#19982; <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">next</span><span class="br0">(</span>first, ranges<span class="sy4">::</span><span class="me2">distance</span><span class="br0">(</span>middle, last<span class="br0">)</span><span class="br0">)</span></span></span> &#27604;&#36739;&#30456;&#31561;&#65292;&#24182;&#25351;&#20195; <code>first</code> &#25152;&#25351;&#21521;&#30340;&#20803;&#32032;&#30340;&#26032;&#20301;&#32622;&#12290;</p>
<h3><span class="mw-headline" id=".E5.A4.8D.E6.9D.82.E5.BA.A6">&#22797;&#26434;&#24230;</span></h3>
<p>&#26368;&#22351;&#20026;<i>&#32447;&#24615;</i>&#65306; <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">distance</span><span class="br0">(</span>first, last<span class="br0">)</span></span></span> &#27425;&#20132;&#25442;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#22312;&#24120;&#35265;&#23454;&#29616;&#19978;&#65292;&#33509; <code>I</code> &#23454;&#29616; <a href="cpp-iterator-bidirectional_iterator.html"><code>bidirectional_iterator</code></a> &#25110;&#65288;&#26356;&#22909;&#30340;&#65289; <a href="cpp-iterator-random_access_iterator.html"><code>random_access_iterator</code></a> &#21017; <code>ranges::rotate</code> &#26377;&#26356;&#39640;&#30340;&#25928;&#29575;&#12290;</p>
<p>&#23454;&#29616;&#65288;&#20363;&#22914; <a rel="nofollow" class="external text" href="https://github.com/microsoft/STL/blob/main/stl/src/vector_algorithms.cpp">MSVC STL</a> &#65289;&#21487;&#33021;&#22312;&#36845;&#20195;&#22120;&#31867;&#22411;&#23454;&#29616; <a href="cpp-iterator-contiguous_iterator.html"><code>contiguous_iterator</code></a> &#65292;&#24182;&#19988;&#20132;&#25442;&#20854;&#20540;&#31867;&#22411;&#19981;&#35843;&#29992;&#38750;&#24179;&#20961;&#30340;&#29305;&#27530;&#25104;&#21592;&#20989;&#25968;&#25110; <a href="cpp-language-adl.html">ADL</a> &#25152;&#25214;&#21040;&#30340; <code>swap</code> &#26102;&#21551;&#29992;&#21521;&#37327;&#21270;&#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>
<p>&#21442;&#38405; <a rel="nofollow" class="external text" href="https://github.com/gcc-mirror/gcc/blob/14d8a5ae472ca5743016f37da2dd4770d83dea21/libstdc%2B%2B-v3/include/bits/ranges_algo.h#L1361-L1506">libstdc++</a> &#19982; <a rel="nofollow" class="external text" href="https://github.com/microsoft/STL/blob/472161105d596192194d4715ccad307c6c163b4a/stl/inc/algorithm#L4407-L4434">MSVC STL</a> &#20013;&#30340;&#23454;&#29616;&#12290;</p>
<table class="eq-fun-cpp-table">
<tr>
<td>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">struct</span> rotate_fn <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">permutable</span> I, std<span class="sy4">::</span><span class="me2">sentinel_for</span><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span> S<span class="sy1">&gt;</span>
<span class="kw4">constexpr</span> ranges<span class="sy4">::</span><span class="me2">subrange</span><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span>
operator<span class="br0">(</span><span class="br0">)</span> <span class="br0">(</span> I first, I middle, S last <span class="br0">)</span> <span class="kw4">const</span> <span class="br0">{</span>
<span class="kw1">if</span> <span class="br0">(</span>first <span class="sy1">==</span> middle<span class="br0">)</span> <span class="br0">{</span>
<span class="kw4">auto</span> last_it<span class="br0">{</span><a href="cpp-iterator-next.html"><span class="kw674">std::<span class="me2">next</span></span></a><span class="br0">(</span>first, last<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">return</span> <span class="br0">{</span>last_it, last_it<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw1">if</span> <span class="br0">(</span>middle <span class="sy1">==</span> last<span class="br0">)</span>
<span class="kw1">return</span> <span class="br0">{</span>std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>first<span class="br0">)</span>, std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>middle<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="kw4">constexpr</span> <span class="br0">(</span>std<span class="sy4">::</span><span class="me2">bidirectional_iterator</span><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="br0">)</span> <span class="br0">{</span>
ranges<span class="sy4">::</span><span class="me2">reverse</span><span class="br0">(</span>fist, middle<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">auto</span> last_it<span class="br0">{</span>ranges<span class="sy4">::</span><span class="me2">next</span><span class="br0">(</span>first, last<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
ranges<span class="sy4">::</span><span class="me2">reverse</span><span class="br0">(</span>middle, last_it<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="kw4">constexpr</span> <span class="br0">(</span>std<span class="sy4">::</span><span class="me2">random_access_iterator</span><span class="sy1">&lt;</span>I<span class="sy1">&gt;</span><span class="br0">)</span> <span class="br0">{</span>
ranges<span class="sy4">::</span><span class="me2">reverse</span><span class="br0">(</span>first, last_it<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">return</span> <span class="br0">{</span>first <span class="sy2">+</span> <span class="br0">(</span>last_it <span class="sy2">-</span> middle<span class="br0">)</span>, std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>last_it<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw1">else</span> <span class="br0">{</span>
<span class="kw4">auto</span> mid_last<span class="br0">{</span>last_it<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">do</span> <span class="br0">{</span>
ranges<span class="sy4">::</span><span class="me2">iter_swap</span><span class="br0">(</span>first, <span class="sy2">--</span>mid_last<span class="br0">)</span><span class="sy4">;</span>
<span class="sy2">++</span>first<span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw1">while</span> <span class="br0">(</span>first <span class="sy3">!</span><span class="sy1">=</span> middle <span class="sy3">&amp;&amp;</span> mid_last <span class="sy3">!</span><span class="sy1">=</span> middle<span class="br0">)</span><span class="sy4">;</span>
ranges<span class="sy4">::</span><span class="me2">reverse</span><span class="br0">(</span>first, mid_last<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span>first <span class="sy1">==</span> middle<span class="br0">)</span>
<span class="kw1">return</span> <span class="br0">{</span>std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>mid_last<span class="br0">)</span>, std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>last_it<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">else</span>
<span class="kw1">return</span> <span class="br0">{</span>std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>first<span class="br0">)</span>, std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>last_it<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="br0">}</span>
<span class="kw1">else</span> <span class="br0">{</span> <span class="co1">// I &#20165;&#20026; forward_iterator</span>
<span class="kw4">auto</span> next_it<span class="br0">{</span>middle<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">do</span> <span class="br0">{</span> <span class="co1">// rotate &#31532;&#19968;&#24490;&#29615;</span>
ranges<span class="sy4">::</span><span class="me2">iter_swap</span><span class="br0">(</span>first, next_it<span class="br0">)</span><span class="sy4">;</span>
<span class="sy2">++</span>first<span class="sy4">;</span>
<span class="sy2">++</span>next_it<span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span>first <span class="sy1">==</span> middle<span class="br0">)</span>
middle <span class="sy1">=</span> next_it<span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw1">while</span> <span class="br0">(</span>next_it <span class="sy3">!</span><span class="sy1">=</span> last<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">auto</span> new_first<span class="br0">{</span>first<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">while</span> <span class="br0">(</span>middle <span class="sy3">!</span><span class="sy1">=</span> last<span class="br0">)</span> <span class="br0">{</span> <span class="co1">// rotate &#21518;&#32487;&#24490;&#29615;</span>
next_it <span class="sy1">=</span> middle<span class="sy4">;</span>
<span class="kw1">do</span> <span class="br0">{</span>
ranges<span class="sy4">::</span><span class="me2">iter_swap</span><span class="br0">(</span>first, next_it<span class="br0">)</span><span class="sy4">;</span>
<span class="sy2">++</span>first<span class="sy4">;</span>
<span class="sy2">++</span>next_it<span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span>first <span class="sy1">==</span> middle<span class="br0">)</span>
middle <span class="sy1">=</span> next_it<span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw1">while</span> <span class="br0">(</span>next_it <span class="sy3">!</span><span class="sy1">=</span> last<span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw1">return</span> <span class="br0">{</span>std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>new_first<span class="br0">)</span>, std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>middle<span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="br0">}</span>
<span class="kw1">template</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">forward_range</span> R<span class="sy1">&gt;</span>
requires std<span class="sy4">::</span><span class="me2">permutable</span><span class="sy1">&lt;</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>R<span class="sy1">&gt;&gt;</span>
<span class="kw4">constexpr</span> ranges<span class="sy4">::</span><span class="me2">borrowed_subrange_t</span><span class="sy1">&lt;</span>R<span class="sy1">&gt;</span>
operator<span class="br0">(</span><span class="br0">)</span> <span class="br0">(</span> R<span class="sy3">&amp;&amp;</span> r, ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1">&lt;</span>R<span class="sy1">&gt;</span> middle <span class="br0">)</span> <span class="kw4">const</span> <span class="br0">{</span>
<span class="kw1">return</span> <span class="br0">(</span><span class="sy2">*</span>this<span class="br0">)</span><span class="br0">(</span>ranges<span class="sy4">::</span><span class="me2">begin</span><span class="br0">(</span>r<span class="br0">)</span>, std<span class="sy4">::</span><span class="me2">move</span><span class="br0">(</span>middle<span class="br0">)</span>, ranges<span class="sy4">::</span><span class="me2">end</span><span class="br0">(</span>r<span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">inline</span> <span class="kw4">constexpr</span> rotate_fn rotate<span class="br0">{</span><span class="br0">}</span><span class="sy4">;</span></pre></div>
</div>
</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<p><i><code>rotate</code></i> &#31639;&#27861;&#33021;&#29992;&#20316;&#35768;&#22810;&#20854;&#20182;&#31639;&#27861;&#30340;&#20844;&#20849;&#26500;&#24314;&#22359;&#65292;&#20363;&#22914;<i>&#25554;&#20837;&#25490;&#24207;</i>&#65306;</p>
<div class="t-example-live-link"></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;algorithm&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;numeric&gt;</span>
<span class="co2">#include &lt;string&gt;</span>
<span class="co2">#include &lt;vector&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a> s<span class="br0">(</span><span class="nu0">16</span>, <span class="st0">&#39; &#39;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">int</span> k<span class="br0">{</span><span class="br0">}</span><span class="sy4">;</span> k <span class="sy3">!</span><span class="sy1">=</span> <span class="nu0">5</span><span class="sy4">;</span> <span class="sy2">++</span>k<span class="br0">)</span> <span class="br0">{</span>
<a href="cpp-algorithm-iota.html"><span class="kw1655">std::<span class="me2">iota</span></span></a><span class="br0">(</span>s.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, s.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>, <span class="st0">&#39;A&#39;</span><span class="br0">)</span><span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">rotate</span><span class="br0">(</span>s, s.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">+</span> k<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Rotate left (&quot;</span> <span class="sy1">&lt;&lt;</span> k <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;): &quot;</span> <span class="sy1">&lt;&lt;</span> s <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>
<a href="cpp-io-cout.html"><span class="kw1758">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="kw1">for</span> <span class="br0">(</span><span class="kw4">int</span> k<span class="br0">{</span><span class="br0">}</span><span class="sy4">;</span> k <span class="sy3">!</span><span class="sy1">=</span> <span class="nu0">5</span><span class="sy4">;</span> <span class="sy2">++</span>k<span class="br0">)</span> <span class="br0">{</span>
<a href="cpp-algorithm-iota.html"><span class="kw1655">std::<span class="me2">iota</span></span></a><span class="br0">(</span>s.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, s.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span>, <span class="st0">&#39;A&#39;</span><span class="br0">)</span><span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">rotate</span><span class="br0">(</span>s, s.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">-</span> k<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Rotate right (&quot;</span> <span class="sy1">&lt;&lt;</span> k <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;): &quot;</span> <span class="sy1">&lt;&lt;</span> s <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>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;<span class="es1">\n</span>&quot;</span> <span class="st0">&quot;Insertion sort using `rotate`, step-by-step:<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
s <span class="sy1">=</span> <span class="br0">{</span><span class="st0">&#39;2&#39;</span>, <span class="st0">&#39;4&#39;</span>, <span class="st0">&#39;2&#39;</span>, <span class="st0">&#39;0&#39;</span>, <span class="st0">&#39;5&#39;</span>, <span class="st0">&#39;9&#39;</span>, <span class="st0">&#39;7&#39;</span>, <span class="st0">&#39;3&#39;</span>, <span class="st0">&#39;7&#39;</span>, <span class="st0">&#39;1&#39;</span><span class="br0">}</span><span class="sy4">;</span>
<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">auto</span> i <span class="sy1">=</span> s.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> i <span class="sy3">!</span><span class="sy1">=</span> s.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="sy2">++</span>i<span class="br0">)</span> <span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;i = &quot;</span> <span class="sy1">&lt;&lt;</span> std<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">distance</span><span class="br0">(</span>s.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, i<span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;: &quot;</span><span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">rotate</span><span class="br0">(</span>std<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">upper_bound</span><span class="br0">(</span>s.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, i, <span class="sy2">*</span>i<span class="br0">)</span>, i, i <span class="sy2">+</span> <span class="nu0">1</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> s <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>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="br0">(</span>std<span class="sy4">::</span><span class="me2">ranges</span><span class="sy4">::</span><span class="me2">is_sorted</span><span class="br0">(</span>s<span class="br0">)</span> <span class="sy4">?</span> <span class="st0">&quot;Sorted!&quot;</span> <span class="sy4">:</span> <span class="st0">&quot;Not sorted.&quot;</span><span class="br0">)</span> <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>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">Rotate left (0): ABCDEFGHIJKLMNOP
Rotate left (1): BCDEFGHIJKLMNOPA
Rotate left (2): CDEFGHIJKLMNOPAB
Rotate left (3): DEFGHIJKLMNOPABC
Rotate left (4): EFGHIJKLMNOPABCD
Rotate right (0): ABCDEFGHIJKLMNOP
Rotate right (1): PABCDEFGHIJKLMNO
Rotate right (2): OPABCDEFGHIJKLMN
Rotate right (3): NOPABCDEFGHIJKLM
Rotate right (4): MNOPABCDEFGHIJKL
Insertion sort using `rotate`, step-by-step:
i = 0: 2420597371
i = 1: 2420597371
i = 2: 2240597371
i = 3: 0224597371
i = 4: 0224597371
i = 5: 0224597371
i = 6: 0224579371
i = 7: 0223457971
i = 8: 0223457791
i = 9: 0122345779
Sorted!</pre></div>
</div>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-ranges-rotate_copy.html"><span class="t-lines"><span>ranges::rotate_copy</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#22797;&#21046;&#24182;&#26059;&#36716;&#20803;&#32032;&#33539;&#22260;<br />
<span class="t-mark">(niebloid)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-ranges-reverse.html"><span class="t-lines"><span>ranges::reverse</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#36870;&#36716;&#33539;&#22260;&#20013;&#30340;&#20803;&#32032;&#39034;&#24207;<br />
<span class="t-mark">(niebloid)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-rotate.html"><span class="t-lines"><span>rotate</span></span></a></div>
</div>
</td>
<td>&#26059;&#36716;&#33539;&#22260;&#20013;&#30340;&#20803;&#32032;&#39034;&#24207;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink