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<div id="projectbrief">Set of algorithms implemented in C++.</div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="namespaces" name="namespaces"></a>
Namespaces</h2></td></tr>
<tr class="memitem:"><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>
@@ -133,10 +152,10 @@ Namespaces</h2></td></tr>
<tr class="heading"><td colspan="2"><h2 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"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html#a9f59fe72dacc1f1218ef3c303d843168">sorting::quicksort</a> (<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; T &gt; *arr, int32_t low, int32_t high)</td></tr>
<tr class="memitem:a9f59fe72dacc1f1218ef3c303d843168"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" 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>
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<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><h2 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>
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<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> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/srand.html">std::srand</a>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/time.html">std::time</a>(<span class="keyword">nullptr</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>
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<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> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;\nTesting Double type arrays\n&quot;</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 = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % 500;</div>
<div class="line"><span class="lineno"> 164</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> arr(size);</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(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % 500) -</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> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &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> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> sorted =</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> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;\t Sorted Array is:\n\t&quot;</span>;</div>
<div class="line"><span class="lineno"> 176</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; sorted &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;</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(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/is_sorted.html">std::is_sorted</a>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a>(sorted), <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(sorted)));</div>
<div class="line"><span class="lineno"> 179</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;\t Passed\n&quot;</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="abasic_ostream_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a></div></div>
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<div class="ttc" id="arand_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a></div><div class="ttdeci">T rand(T... args)</div></div>
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<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> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;\nTesting integer type arrays\n&quot;</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 = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % 500;</div>
<div class="line"><span class="lineno"> 143</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;int&gt;</a> arr(size);</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 = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % 500 - 250; <span class="comment">// random numbers between -250, 249</span></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> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &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> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;int&gt;</a> 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"> 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> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;\t Sorted Array is:\n\t&quot;</span>;</div>
<div class="line"><span class="lineno"> 152</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; sorted &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;</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(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/is_sorted.html">std::is_sorted</a>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a>(sorted), <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(sorted)));</div>
<div class="line"><span class="lineno"> 155</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;\t Passed\n&quot;</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>
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