klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
470b6ad77660655c33534cf005828dc90719a197
hustoj/web/cppreference-zh/chmhelp/cpp-numeric-valarray-indirect_array.html
klarkxy 196e706fe4 上传cppreference
2025-08-01 12:57:54 +08:00

131 lines
9.0 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::indirect_array</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_numeric_valarray_indirect_array 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::</span>indirect_array</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-numeric.html">numeric</a>&lrm; | <a href="cpp-numeric-valarray.html">valarray</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-valarray.html">&lt;valarray&gt;</a></code></div>
</td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad">
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> T <span class="sy1">&gt;</span> <span class="kw1">class</span> indirect_array<span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td class="t-dcl-nopad"></td>
</tr>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p><code>std::indirect_array</code> &#26159; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-valarray.html"><span class="kw1473">std::<span class="me2">valarray</span></span></a></span></span> &#23545; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-valarray.html"><span class="kw1473">std::<span class="me2">valarray</span></span></a><span class="sy1">&lt;</span><a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a><span class="sy1">&gt;</span></span></span> &#30340;&#19979;&#26631;&#36816;&#31639;&#31526;&#25152;&#29992;&#30340;&#24110;&#21161;&#27169;&#26495;&#12290;&#23427;&#25317;&#26377;&#21040;&#38388;&#25509;&#25968;&#32452;&#65288; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-valarray.html"><span class="kw1473">std::<span class="me2">valarray</span></span></a><span class="sy1">&lt;</span><a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a><span class="sy1">&gt;</span></span></span> &#23545;&#35937;&#65289;&#25152;&#25351;&#23450;&#30340;&#25968;&#32452;&#23376;&#38598;&#30340;&#24341;&#29992;&#35821;&#20041;&#12290;</p>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E7.B1.BB.E5.9E.8B">&#25104;&#21592;&#31867;&#22411;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-hitem">
<td>&#31867;&#22411;</td>
<td>&#23450;&#20041;</td>
</tr>
<tr class="t-dsc">
<td><code>value_type</code></td>
<td><code>T</code></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">&#25104;&#21592;&#20989;&#25968;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-numeric-valarray-indirect_array-indirect_array.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</span></span></a></div>
</div>
</td>
<td>&#26500;&#36896;&#19968;&#20010; <code>indirect_array</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-numeric-valarray-indirect_array-~indirect_array.html"><span class="t-lines"><span>(&#26512;&#26500;&#20989;&#25968;)</span></span></a></div>
</div>
</td>
<td>&#38144;&#27585;&#19968;&#20010; <code>indirect_array</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-valarray-indirect_array-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
</div>
</td>
<td>&#36171;&#20540;&#20869;&#23481;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-valarray-indirect_array-operator_arith.html"><span class="t-lines"><span>operator+=</span><span>operator-=</span><span>operator*=</span><span>operator/=</span><span>operator%=</span><span>operator&amp;=</span><span>operator|=</span><span>operator^=</span><span>operator&lt;&lt;=</span><span>operator&gt;&gt;=</span></span></a></div>
</div>
</td>
<td>&#22312;&#38388;&#25509;&#25968;&#32452;&#25152;&#25351;&#20195;&#30340;&#25968;&#32452;&#19978;&#36827;&#34892;&#31639;&#26415;&#36816;&#31639;&#12290;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<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;iostream&gt;</span>
<span class="co2">#include &lt;valarray&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-numeric-valarray.html"><span class="kw1473">std::<span class="me2">valarray</span></span></a><span class="sy1">&lt;</span><span class="kw4">int</span><span class="sy1">&gt;</span> data <span class="sy1">=</span> <span class="br0">{</span><span class="nu0">0</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="nu0">6</span>,<span class="nu0">7</span>,<span class="nu0">8</span>,<span class="nu0">9</span><span class="br0">}</span><span class="sy4">;</span>
<a href="cpp-numeric-valarray.html"><span class="kw1473">std::<span class="me2">valarray</span></span></a><span class="sy1">&lt;</span><a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a><span class="sy1">&gt;</span> idx <span class="sy1">=</span> <span class="br0">{</span><span class="nu0">0</span>,<span class="nu0">2</span>,<span class="nu0">4</span>,<span class="nu0">6</span>,<span class="nu0">8</span><span class="br0">}</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">&quot;Original valarray: &quot;</span><span class="sy4">;</span>
<span class="kw1">for</span><span class="br0">(</span><span class="kw4">int</span> n<span class="sy4">:</span> data<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>
data<span class="br0">[</span>idx<span class="br0">]</span> <span class="sy2">+</span><span class="sy1">=</span> data<span class="br0">[</span>idx<span class="br0">]</span><span class="sy4">;</span> <span class="co1">// &#20196;&#22312;&#19979;&#26631; &#39;idx&#39; &#30340;&#20540;&#21464;&#20026;&#21452;&#20493;</span>
<span class="co1">// data[idx] &#30340;&#31867;&#22411;&#26159; std::indirect_array&lt;int&gt;</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">&quot;After indirect modification: &quot;</span><span class="sy4">;</span>
<span class="kw1">for</span><span class="br0">(</span><span class="kw4">int</span> n<span class="sy4">:</span> data<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>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">Original valarray: 0 1 2 3 4 5 6 7 8 9
After indirect modification: 0 1 4 3 8 5 12 7 16 9</pre></div>
</div>
</div>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink