backup/C-Plus-Plus
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/C-Plus-Plus.git synced 2026-03-21 20:31:43 +08:00
Code Issues Projects Releases Wiki Activity
Files
b41207008fce7f0e1d51097b0feebbf14d31ffe0
C-Plus-Plus/d3/d4c/quick__sort__3_8cpp.html
realstealthninja b41207008f Documentation for f1eddf4d65
2025-07-09 10:53:16 +00:00

304 lines
19 KiB
HTML
Raw Blame History

<!-- HTML header for doxygen 1.12.0-->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=11"/>
<meta name="generator" content="Doxygen 1.14.0"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>TheAlgorithms/C++: sorting/quick_sort_3.cpp File Reference</title>
<link rel="icon" href="../../favicon.svg" type="image/x-icon" />
<link href="../../tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="../../jquery.js"></script>
<script type="text/javascript" src="../../dynsections.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/@xpack-3rd-party/doxygen-awesome-css@2.2.0-1/doxygen-awesome-darkmode-toggle.js"></script>
<script type="text/javascript">
DoxygenAwesomeDarkModeToggle.init()
</script>
<script type="text/javascript" src="../../clipboard.js"></script>
<link href="../../navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="../../navtreedata.js"></script>
<script type="text/javascript" src="../../navtree.js"></script>
<script type="text/javascript" src="../../cookie.js"></script>
<link href="../../search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="../../search/searchdata.js"></script>
<script type="text/javascript" src="../../search/search.js"></script>
<script type="text/javascript">
window.MathJax = {
options: {
ignoreHtmlClass: 'tex2jax_ignore',
processHtmlClass: 'tex2jax_process'
},
loader: {
load: ['[tex]/ams']
},
tex: {
macros: {},
packages: ['base','configmacros','ams']
}
};
</script>
<script type="text/javascript" id="MathJax-script" async="async" src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"></script>
<link href="../../doxygen.css" rel="stylesheet" type="text/css" />
<link href="../../doxygen-awesome.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr id="projectrow">
<td id="projectlogo"><img alt="Logo" src="../../project_logo.png"/></td>
<td id="projectalign">
<div id="projectname">TheAlgorithms/C++<span id="projectnumber">&#160;1.0.0</span>
</div>
<div id="projectbrief">All the algorithms implemented in C++</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.14.0 -->
<script type="text/javascript">
var searchBox = new SearchBox("searchBox", "../../search/",'.html');
</script>
<script type="text/javascript">
$(function() { codefold.init(); });
</script>
<script type="text/javascript" src="../../menudata.js"></script>
<script type="text/javascript" src="../../menu.js"></script>
<script type="text/javascript">
$(function() {
initMenu('../../',true,false,'search.php','Search',true);
$(function() { init_search(); });
});
</script>
<div id="main-nav"></div>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
<div id="nav-sync" class="sync"></div>
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
$(function(){initNavTree('d3/d4c/quick__sort__3_8cpp.html','../../',''); });
</script>
<div id="container">
<div id="doc-content">
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>
<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<div id="MSearchResults">
<div class="SRPage">
<div id="SRIndex">
<div id="SRResults"></div>
<div class="SRStatus" id="Loading">Loading...</div>
<div class="SRStatus" id="Searching">Searching...</div>
<div class="SRStatus" id="NoMatches">No Matches</div>
</div>
</div>
</div>
</div>
<div class="header">
<div class="headertitle"><div class="title">quick_sort_3.cpp File Reference</div></div>
</div><!--header-->
<div class="contents">
<p>Implementation Details.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;algorithm&gt;</code><br />
<code>#include &lt;cassert&gt;</code><br />
<code>#include &lt;ctime&gt;</code><br />
<code>#include &lt;iostream&gt;</code><br />
<code>#include &lt;vector&gt;</code><br />
</div><div class="textblock"><div class="dynheader">
Include dependency graph for quick_sort_3.cpp:</div>
<div class="dyncontent">
<div class="center"><iframe scrolling="no" loading="lazy" frameborder="0" src="../../d8/df7/quick__sort__3_8cpp__incl.svg" width="427" height="126"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div>
</div>
</div>
<p><a href="../../d3/d4c/quick__sort__3_8cpp_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-namespaces" class="groupheader"><a id="namespaces" name="namespaces"></a>
Namespaces</h2></td></tr>
<tr class="memitem:sorting" id="r_sorting"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html">sorting</a></td></tr>
<tr class="memdesc:d5/d91/namespacesorting"><td class="mdescLeft">&#160;</td><td class="mdescRight">for working with vectors <br /></td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-func-members" class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a9f59fe72dacc1f1218ef3c303d843168" id="r_a9f59fe72dacc1f1218ef3c303d843168"><td class="memTemplParams" colspan="2">template&lt;typename T&gt; </td></tr>
<tr class="memitem:a9f59fe72dacc1f1218ef3c303d843168 template"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html#a9f59fe72dacc1f1218ef3c303d843168">sorting::quicksort</a> (std::vector&lt; T &gt; *arr, int32_t low, int32_t high)</td></tr>
<tr class="memitem:a6eb67c2f91c98cf4464f75b5882022de" id="r_a6eb67c2f91c98cf4464f75b5882022de"><td class="memTemplParams" colspan="2">template&lt;typename T&gt; </td></tr>
<tr class="memitem:a6eb67c2f91c98cf4464f75b5882022de template"><td class="memItemLeft" align="right" valign="top">std::vector&lt; T &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html#a6eb67c2f91c98cf4464f75b5882022de">sorting::quicksort</a> (std::vector&lt; T &gt; arr, int32_t low, int32_t high)</td></tr>
<tr class="memitem:a07e5c62de28aeddea986890ce7ac1bda" id="r_a07e5c62de28aeddea986890ce7ac1bda"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a07e5c62de28aeddea986890ce7ac1bda">test_int</a> ()</td></tr>
<tr class="memitem:a2635b04ad943fa28b7bbf8d1e6479792" id="r_a2635b04ad943fa28b7bbf8d1e6479792"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a2635b04ad943fa28b7bbf8d1e6479792">test_double</a> ()</td></tr>
<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4" id="r_ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
</table>
<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Implementation Details. </p>
<p>Quick sort 3 works on Dutch National Flag Algorithm The major difference between simple quicksort and quick sort 3 comes in the function partition3 In quick_sort_partition3 we divide the vector/array into 3 parts. quick sort 3 works faster in some cases as compared to simple quicksort. </p><dl class="section author"><dt>Author</dt><dd>immortal-j </dd>
<dd>
<a href="https://github/kvedala" target="_blank">Krishna Vedala</a> </dd></dl>
<p class="definition">Definition in file <a class="el" href="../../d3/d4c/quick__sort__3_8cpp_source.html">quick_sort_3.cpp</a>.</p>
</div><a name="doc-func-members" id="doc-func-members"></a><h2 id="header-doc-func-members" class="groupheader">Function Documentation</h2>
<a id="ae66f6b31b5ad750f1fe042a706a4e3d4" name="ae66f6b31b5ad750f1fe042a706a4e3d4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&#160;</a></span>main()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int main </td>
<td>(</td>
<td class="paramtype">void</td> <td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Driver program for above functions </p>
<p class="definition">Definition at line <a class="el" href="../../d3/d4c/quick__sort__3_8cpp_source.html#l00184">184</a> of file <a class="el" href="../../d3/d4c/quick__sort__3_8cpp_source.html">quick_sort_3.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 184</span> {</div>
<div class="line"><span class="lineno"> 185</span> std::srand(std::time(<span class="keyword">nullptr</span>));</div>
<div class="line"><span class="lineno"> 186</span> <a class="code hl_function" href="#a07e5c62de28aeddea986890ce7ac1bda">test_int</a>();</div>
<div class="line"><span class="lineno"> 187</span> <a class="code hl_function" href="#a2635b04ad943fa28b7bbf8d1e6479792">test_double</a>();</div>
<div class="line"><span class="lineno"> 188</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 189</span>}</div>
<div class="ttc" id="aquick__sort__3_8cpp_html_a07e5c62de28aeddea986890ce7ac1bda"><div class="ttname"><a href="#a07e5c62de28aeddea986890ce7ac1bda">test_int</a></div><div class="ttdeci">static void test_int()</div><div class="ttdef"><b>Definition</b> <a href="../../d3/d4c/quick__sort__3_8cpp_source.html#l00138">quick_sort_3.cpp:138</a></div></div>
<div class="ttc" id="aquick__sort__3_8cpp_html_a2635b04ad943fa28b7bbf8d1e6479792"><div class="ttname"><a href="#a2635b04ad943fa28b7bbf8d1e6479792">test_double</a></div><div class="ttdeci">static void test_double()</div><div class="ttdef"><b>Definition</b> <a href="../../d3/d4c/quick__sort__3_8cpp_source.html#l00160">quick_sort_3.cpp:160</a></div></div>
</div><!-- fragment -->
</div>
</div>
<a id="a2635b04ad943fa28b7bbf8d1e6479792" name="a2635b04ad943fa28b7bbf8d1e6479792"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a2635b04ad943fa28b7bbf8d1e6479792">&#9670;&#160;</a></span>test_double()</h2>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void test_double </td>
<td>(</td>
<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel static">static</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Test function for double type arrays </p>
<p class="definition">Definition at line <a class="el" href="../../d3/d4c/quick__sort__3_8cpp_source.html#l00160">160</a> of file <a class="el" href="../../d3/d4c/quick__sort__3_8cpp_source.html">quick_sort_3.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 160</span> {</div>
<div class="line"><span class="lineno"> 161</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\nTesting Double type arrays\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 162</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> num_tests = 1; num_tests &lt; 21; num_tests++) {</div>
<div class="line"><span class="lineno"> 163</span> <span class="keywordtype">size_t</span> size = std::rand() % 500;</div>
<div class="line"><span class="lineno"> 164</span> std::vector&lt;double&gt; arr(size);</div>
<div class="line"><span class="lineno"> 165</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> &amp;a : arr) {</div>
<div class="line"><span class="lineno"> 166</span> a = double(std::rand() % 500) -</div>
<div class="line"><span class="lineno"> 167</span> 250.f; <span class="comment">// random numbers between -250, 249</span></div>
<div class="line"><span class="lineno"> 168</span> a /= 100.f; <span class="comment">// convert to -2.5 to 2.49</span></div>
<div class="line"><span class="lineno"> 169</span> }</div>
<div class="line"><span class="lineno"> 170</span> </div>
<div class="line"><span class="lineno"> 171</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test &quot;</span> &lt;&lt; num_tests &lt;&lt; <span class="stringliteral">&quot;\t Array size:&quot;</span> &lt;&lt; size &lt;&lt; <span class="stringliteral">&quot;\t &quot;</span>;</div>
<div class="line"><span class="lineno"> 172</span> std::vector&lt;double&gt; sorted =</div>
<div class="line"><span class="lineno"> 173</span> <a class="code hl_function" href="../../d5/d91/namespacesorting.html#a9f59fe72dacc1f1218ef3c303d843168">sorting::quicksort</a>(arr, 0, int32_t(size) - 1);</div>
<div class="line"><span class="lineno"> 174</span> <span class="keywordflow">if</span> (size &lt; 20) {</div>
<div class="line"><span class="lineno"> 175</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\t Sorted Array is:\n\t&quot;</span>;</div>
<div class="line"><span class="lineno"> 176</span> std::cout &lt;&lt; sorted &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 177</span> }</div>
<div class="line"><span class="lineno"> 178</span> assert(std::is_sorted(std::begin(sorted), std::end(sorted)));</div>
<div class="line"><span class="lineno"> 179</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\t Passed\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 180</span> }</div>
<div class="line"><span class="lineno"> 181</span>}</div>
<div class="ttc" id="anamespacesorting_html_a9f59fe72dacc1f1218ef3c303d843168"><div class="ttname"><a href="../../d5/d91/namespacesorting.html#a9f59fe72dacc1f1218ef3c303d843168">sorting::quicksort</a></div><div class="ttdeci">void quicksort(std::vector&lt; T &gt; *arr, int32_t low, int32_t high)</div><div class="ttdef"><b>Definition</b> <a href="../../d3/d4c/quick__sort__3_8cpp_source.html#l00094">quick_sort_3.cpp:94</a></div></div>
</div><!-- fragment -->
</div>
</div>
<a id="a07e5c62de28aeddea986890ce7ac1bda" name="a07e5c62de28aeddea986890ce7ac1bda"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a07e5c62de28aeddea986890ce7ac1bda">&#9670;&#160;</a></span>test_int()</h2>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void test_int </td>
<td>(</td>
<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel static">static</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Test function for integer type arrays </p>
<p class="definition">Definition at line <a class="el" href="../../d3/d4c/quick__sort__3_8cpp_source.html#l00138">138</a> of file <a class="el" href="../../d3/d4c/quick__sort__3_8cpp_source.html">quick_sort_3.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 138</span> {</div>
<div class="line"><span class="lineno"> 139</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\nTesting integer type arrays\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 140</span> </div>
<div class="line"><span class="lineno"> 141</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> num_tests = 1; num_tests &lt; 21; num_tests++) {</div>
<div class="line"><span class="lineno"> 142</span> <span class="keywordtype">size_t</span> size = std::rand() % 500;</div>
<div class="line"><span class="lineno"> 143</span> std::vector&lt;int&gt; arr(size);</div>
<div class="line"><span class="lineno"> 144</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> &amp;a : arr) {</div>
<div class="line"><span class="lineno"> 145</span> a = std::rand() % 500 - 250; <span class="comment">// random numbers between -250, 249</span></div>
<div class="line"><span class="lineno"> 146</span> }</div>
<div class="line"><span class="lineno"> 147</span> </div>
<div class="line"><span class="lineno"> 148</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test &quot;</span> &lt;&lt; num_tests &lt;&lt; <span class="stringliteral">&quot;\t Array size:&quot;</span> &lt;&lt; size &lt;&lt; <span class="stringliteral">&quot;\t &quot;</span>;</div>
<div class="line"><span class="lineno"> 149</span> std::vector&lt;int&gt; sorted = <a class="code hl_function" href="../../d5/d91/namespacesorting.html#a9f59fe72dacc1f1218ef3c303d843168">sorting::quicksort</a>(arr, 0, int32_t(size) - 1);</div>
<div class="line"><span class="lineno"> 150</span> <span class="keywordflow">if</span> (size &lt; 20) {</div>
<div class="line"><span class="lineno"> 151</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\t Sorted Array is:\n\t&quot;</span>;</div>
<div class="line"><span class="lineno"> 152</span> std::cout &lt;&lt; sorted &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 153</span> }</div>
<div class="line"><span class="lineno"> 154</span> assert(std::is_sorted(std::begin(sorted), std::end(sorted)));</div>
<div class="line"><span class="lineno"> 155</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\t Passed\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 156</span> }</div>
<div class="line"><span class="lineno"> 157</span>}</div>
</div><!-- fragment -->
</div>
</div>
</div><!-- contents -->
</div><!-- doc-content -->
<div id="page-nav" class="page-nav-panel">
<div id="page-nav-resize-handle"></div>
<div id="page-nav-tree">
<div id="page-nav-contents">
</div><!-- page-nav-contents -->
</div><!-- page-nav-tree -->
</div><!-- page-nav -->
</div><!-- container -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
<ul>
<li class="navelem"><a href="../../dir_bb1b521853a9c46347182a9d10420771.html">sorting</a></li><li class="navelem"><a href="../../d3/d4c/quick__sort__3_8cpp.html">quick_sort_3.cpp</a></li>
<li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="../../doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.14.0 </li>
</ul>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink