104 lines
6.4 KiB
HTML
104 lines
6.4 KiB
HTML
<!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::experimental::reseed</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_experimental_reseed 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::experimental::</span>reseed</h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-experimental.html">experimental</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>定义于头文件 <code><a href="https://zh.cppreference.com/mwiki/index.php?title=cpp/header/experimental/random&action=edit&redlink=1" class="new" title="cpp/header/experimental/random（页面不存在）"><experimental/random></a></code></div>
|
|
</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-libfund_ts_2">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> reseed<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(库基础 TS v2)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-libfund_ts_2">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> reseed<span class="br0">(</span>std<span class="sy4">::</span><span class="me2">default_random_engine</span><span class="sy4">::</span><span class="me2">result_type</span> value<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(2)</td>
|
|
<td><span class="t-mark-rev t-since-libfund-ts-2 t-mark-ts">(库基础 TS v2)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>重播种<a href="cpp-experimental-lib_extensions_2.html#.E9.80.90.E7.BA.BF.E7.A8.8B.E5.BC.95.E6.93.8E">逐线程随机数引擎</a>和 <a href="cpp-experimental-randint.html"><tt>randint</tt></a> 所用的任何 <span class="t-lc"><a href="cpp-numeric-random-uniform_int_distribution.html">std::uniform_int_distribution</a></span> 实例。</p>
|
|
<div class="t-li1"><span class="t-li">1)</span> 设置逐线程引擎为不可预测状态。</div>
|
|
<div class="t-li1"><span class="t-li">2)</span> 如同用 <span class="t-c"><span class="mw-geshi cpp source-cpp">g.<span class="me1">seed</span><span class="br0">(</span>value<span class="br0">)</span></span></span> 播种逐线程引擎 <code>g</code> 。</div>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
|
|
<table class="t-par-begin">
|
|
<tr class="t-par">
|
|
<td>value</td>
|
|
<td>-</td>
|
|
<td>新种子的值</td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E6.8F.90.E9.86.92">提醒</span></h3>
|
|
<p>对 <code>randint</code> 的后继调用不依赖于调用 <code>reseed</code> 之前的逐线程引擎所产生的值。</p>
|
|
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</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 <experimental/random></span>
|
|
<span class="co2">#include <iostream></span>
|
|
|
|
<span class="kw4">auto</span> main<span class="br0">(</span><span class="br0">)</span> <span class="sy2">-</span><span class="sy1">></span> <span class="kw4">int</span>
|
|
<span class="br0">{</span>
|
|
std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">reseed</span><span class="br0">(</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"><<</span> <span class="st0">"Random 2-digit decimal numbers: "</span><span class="sy4">;</span>
|
|
|
|
<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">auto</span> i <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span> i <span class="sy3">!</span><span class="sy1">=</span> <span class="nu0">3</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"><<</span> <a href="cpp-experimental-randint.html"><span class="kw2433">std::<span class="me2">experimental</span><span class="sy4">::</span><span class="me2">randint</span></span></a><span class="br0">(</span><span class="nu0">10</span>, <span class="nu0">99</span><span class="br0">)</span> <span class="sy1"><<</span> <span class="st0">' '</span><span class="sy4">;</span>
|
|
<span class="br0">}</span>
|
|
<span class="br0">}</span></pre></div>
|
|
</div>
|
|
<p>可能的输出：</p>
|
|
<div dir="ltr" class="mw-geshi" style="text-align: left;">
|
|
<div class="text source-text">
|
|
<pre class="de1">Random 2-digit decimal numbers: 41 60 56</pre></div>
|
|
</div>
|
|
</div>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-experimental-randint.html"><span class="t-lines"><span>randint</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>生成指定范围中的随机整数<br />
|
|
<span class="t-mark">(函数模板)</span></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|