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<p><a href="https://en.wikipedia.org/wiki/Shell_sort" target="_blank">Shell sort</a> algorithm
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;cassert&gt;</code><br />
<code>#include &lt;cstdlib&gt;</code><br />
<code>#include &lt;ctime&gt;</code><br />
<code>#include &lt;iostream&gt;</code><br />
<code>#include &lt;utility&gt;</code><br />
<code>#include &lt;vector&gt;</code><br />
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Include dependency graph for shell_sort2.cpp:</div>
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<tr class="memdesc:d5/d91/namespacesorting"><td class="mdescLeft">&#160;</td><td class="mdescRight">for working with vectors <br /></td></tr>
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Functions</h2></td></tr>
<tr class="memitem:a951127aea9d7e1e53ea9ae0868633246"><td class="memTemplParams" colspan="2">template&lt;class T &gt; </td></tr>
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<tr class="memitem:a63aaff7cabfa3da2da8b9477b5fad9d6"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d4/d7a/shell__sort2_8cpp.html#a63aaff7cabfa3da2da8b9477b5fad9d6">show_data</a> (T(&amp;arr)[N])</td></tr>
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<tr class="memitem:af2c5b92cbfe73f63f6074c61b0a45331"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html#af2c5b92cbfe73f63f6074c61b0a45331">sorting::shell_sort</a> (<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; T &gt; *arr)</td></tr>
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<tr class="memitem:a7eb77daed2cf1513f6d68c47a1c2db1c"><td class="memTemplItemLeft" align="right" valign="top">int&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d4/d7a/shell__sort2_8cpp.html#a7eb77daed2cf1513f6d68c47a1c2db1c">compare</a> (const void *a, const void *b)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p><a href="https://en.wikipedia.org/wiki/Shell_sort" target="_blank">Shell sort</a> algorithm </p>
<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/kvedala" target="_blank">Krishna Vedala</a> </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a7eb77daed2cf1513f6d68c47a1c2db1c" name="a7eb77daed2cf1513f6d68c47a1c2db1c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7eb77daed2cf1513f6d68c47a1c2db1c">&#9670;&#160;</a></span>compare()</h2>
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<div class="memtemplate">
template&lt;typename T &gt; </div>
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="../../d1/db3/structcompare.html">compare</a> </td>
<td>(</td>
<td class="paramtype">const void *&#160;</td>
<td class="paramname"><em>a</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const void *&#160;</td>
<td class="paramname"><em>b</em>&#160;</td>
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<td></td>
<td>)</td>
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<p>function to compare sorting using cstdlib's qsort </p>
<div class="fragment"><div class="line"><span class="lineno"> 87</span> {</div>
<div class="line"><span class="lineno"> 88</span> T arg1 = *<span class="keyword">static_cast&lt;</span><span class="keyword">const </span>T *<span class="keyword">&gt;</span>(a);</div>
<div class="line"><span class="lineno"> 89</span> T arg2 = *<span class="keyword">static_cast&lt;</span><span class="keyword">const </span>T *<span class="keyword">&gt;</span>(b);</div>
<div class="line"><span class="lineno"> 90</span> </div>
<div class="line"><span class="lineno"> 91</span> <span class="keywordflow">if</span> (arg1 &lt; arg2)</div>
<div class="line"><span class="lineno"> 92</span> <span class="keywordflow">return</span> -1;</div>
<div class="line"><span class="lineno"> 93</span> <span class="keywordflow">if</span> (arg1 &gt; arg2)</div>
<div class="line"><span class="lineno"> 94</span> <span class="keywordflow">return</span> 1;</div>
<div class="line"><span class="lineno"> 95</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 96</span> </div>
<div class="line"><span class="lineno"> 97</span> <span class="comment">// return (arg1 &gt; arg2) - (arg1 &lt; arg2); // possible shortcut</span></div>
<div class="line"><span class="lineno"> 98</span> <span class="comment">// return arg1 - arg2; // erroneous shortcut (fails if INT_MIN is present)</span></div>
<div class="line"><span class="lineno"> 99</span>}</div>
</div><!-- fragment -->
</div>
</div>
<a id="a0ddf1224851353fc92bfbff6f499fa97" name="a0ddf1224851353fc92bfbff6f499fa97"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0ddf1224851353fc92bfbff6f499fa97">&#9670;&#160;</a></span>main()</h2>
<div class="memitem">
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<td class="memname">int main </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>argc</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>argv</em>[]&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Main function </p>
<div class="fragment"><div class="line"><span class="lineno"> 183</span> {</div>
<div class="line"><span class="lineno"> 184</span> <span class="comment">// initialize random number generator - once per program</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>(NULL));</div>
<div class="line"><span class="lineno"> 186</span> </div>
<div class="line"><span class="lineno"> 187</span> <a class="code hl_function" href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a>(100); <span class="comment">// test with sorting random array of 100 values</span></div>
<div class="line"><span class="lineno"> 188</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 1 - 100 int values - passed. \n&quot;</span>;</div>
<div class="line"><span class="lineno"> 189</span> <a class="code hl_function" href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a>(1000); <span class="comment">// test with sorting random array of 1000 values</span></div>
<div class="line"><span class="lineno"> 190</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 2 - 1000 int values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 191</span> <a class="code hl_function" href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a>(10000); <span class="comment">// test with sorting random array of 10000 values</span></div>
<div class="line"><span class="lineno"> 192</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 3 - 10000 int values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 193</span> </div>
<div class="line"><span class="lineno"> 194</span> <a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a22ea0d1f7943ebb4371d31e44b465b6d">test_f</a>(100); <span class="comment">// test with sorting random array of 100 values</span></div>
<div class="line"><span class="lineno"> 195</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 1 - 100 float values - passed. \n&quot;</span>;</div>
<div class="line"><span class="lineno"> 196</span> <a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a22ea0d1f7943ebb4371d31e44b465b6d">test_f</a>(1000); <span class="comment">// test with sorting random array of 1000 values</span></div>
<div class="line"><span class="lineno"> 197</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 2 - 1000 float values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 198</span> <a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a22ea0d1f7943ebb4371d31e44b465b6d">test_f</a>(10000); <span class="comment">// test with sorting random array of 10000 values</span></div>
<div class="line"><span class="lineno"> 199</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 3 - 10000 float values - passed.\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 200</span> </div>
<div class="line"><span class="lineno"> 201</span> <span class="keywordtype">int</span> i, NUM_DATA;</div>
<div class="line"><span class="lineno"> 202</span> </div>
<div class="line"><span class="lineno"> 203</span> <span class="keywordflow">if</span> (argc == 2)</div>
<div class="line"><span class="lineno"> 204</span> NUM_DATA = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/byte/atoi.html">atoi</a>(argv[1]);</div>
<div class="line"><span class="lineno"> 205</span> <span class="keywordflow">else</span></div>
<div class="line"><span class="lineno"> 206</span> NUM_DATA = 200;</div>
<div class="line"><span class="lineno"> 207</span> </div>
<div class="line"><span class="lineno"> 208</span> <span class="comment">// int array = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 209</span> <span class="keywordtype">int</span> *<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a> = <span class="keyword">new</span> <span class="keywordtype">int</span>[NUM_DATA];</div>
<div class="line"><span class="lineno"> 210</span> <span class="comment">// int array2 = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 211</span> <span class="keywordtype">int</span> range = 1800;</div>
<div class="line"><span class="lineno"> 212</span> </div>
<div class="line"><span class="lineno"> 213</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">time</a>(NULL));</div>
<div class="line"><span class="lineno"> 214</span> <span class="keywordflow">for</span> (i = 0; i &lt; NUM_DATA; i++) {</div>
<div class="line"><span class="lineno"> 215</span> <span class="comment">// allocate random numbers in the given range</span></div>
<div class="line"><span class="lineno"> 216</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] = (<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - (range &gt;&gt; 1);</div>
<div class="line"><span class="lineno"> 217</span> }</div>
<div class="line"><span class="lineno"> 218</span> </div>
<div class="line"><span class="lineno"> 219</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;Unsorted original data: &quot;</span> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 220</span> <a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a951127aea9d7e1e53ea9ae0868633246">show_data</a>(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 221</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 222</span> <a class="code hl_function" href="../../d5/d91/namespacesorting.html#a5669396c6a6b1e14b97589b6e37980aa">shell_sort</a>(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA); <span class="comment">// perform sorting</span></div>
<div class="line"><span class="lineno"> 223</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 224</span> </div>
<div class="line"><span class="lineno"> 225</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a></div>
<div class="line"><span class="lineno"> 226</span> &lt;&lt; <span class="stringliteral">&quot;Data Sorted using custom implementation: &quot;</span> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 227</span> <a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a951127aea9d7e1e53ea9ae0868633246">show_data</a>(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 228</span> </div>
<div class="line"><span class="lineno"> 229</span> <span class="keywordtype">double</span> elapsed_time = (<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) * 1.f / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 230</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;Time spent sorting: &quot;</span> &lt;&lt; elapsed_time &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 231</span> </div>
<div class="line"><span class="lineno"> 232</span> <span class="keyword">delete</span>[] <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>;</div>
<div class="line"><span class="lineno"> 233</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 234</span>}</div>
<div class="ttc" id="aatoi_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/byte/atoi.html">std::atoi</a></div><div class="ttdeci">T atoi(T... args)</div></div>
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<div class="ttc" id="ahash__search_8cpp_html_a6e1a77282bc65ad359d753d25df23243"><div class="ttname"><a href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a></div><div class="ttdeci">int data[MAX]</div><div class="ttdoc">test data</div><div class="ttdef"><b>Definition:</b> hash_search.cpp:24</div></div>
<div class="ttc" id="anamespacesorting_html_a5669396c6a6b1e14b97589b6e37980aa"><div class="ttname"><a href="../../d5/d91/namespacesorting.html#a5669396c6a6b1e14b97589b6e37980aa">sorting::shell_sort</a></div><div class="ttdeci">void shell_sort(T *arr, size_t LEN)</div><div class="ttdef"><b>Definition:</b> shell_sort2.cpp:45</div></div>
<div class="ttc" id="aquick__sort__3_8cpp_html_a07e5c62de28aeddea986890ce7ac1bda"><div class="ttname"><a href="../../d3/d4c/quick__sort__3_8cpp.html#a07e5c62de28aeddea986890ce7ac1bda">test_int</a></div><div class="ttdeci">static void test_int()</div><div class="ttdef"><b>Definition:</b> quick_sort_3.cpp:138</div></div>
<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>
<div class="ttc" id="ashell__sort2_8cpp_html_a22ea0d1f7943ebb4371d31e44b465b6d"><div class="ttname"><a href="../../d4/d7a/shell__sort2_8cpp.html#a22ea0d1f7943ebb4371d31e44b465b6d">test_f</a></div><div class="ttdeci">void test_f(const int NUM_DATA)</div><div class="ttdef"><b>Definition:</b> shell_sort2.cpp:145</div></div>
<div class="ttc" id="ashell__sort2_8cpp_html_a951127aea9d7e1e53ea9ae0868633246"><div class="ttname"><a href="../../d4/d7a/shell__sort2_8cpp.html#a951127aea9d7e1e53ea9ae0868633246">show_data</a></div><div class="ttdeci">void show_data(T *arr, size_t LEN)</div><div class="ttdef"><b>Definition:</b> shell_sort2.cpp:18</div></div>
<div class="ttc" id="asrand_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/srand.html">std::srand</a></div><div class="ttdeci">T srand(T... args)</div></div>
<div class="ttc" id="atime_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/chrono/c/time.html">std::time</a></div><div class="ttdeci">T time(T... args)</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a951127aea9d7e1e53ea9ae0868633246">&#9670;&#160;</a></span>show_data() <span class="overload">[1/2]</span></h2>
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template&lt;class T &gt; </div>
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<td class="memname">void show_data </td>
<td>(</td>
<td class="paramtype">T *&#160;</td>
<td class="paramname"><em>arr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>LEN</em>&#160;</td>
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<p>pretty print array </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">arr</td><td>array to print </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">LEN</td><td>length of array to print </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 18</span> {</div>
<div class="line"><span class="lineno"> 19</span> <span class="keywordtype">size_t</span> i;</div>
<div class="line"><span class="lineno"> 20</span> </div>
<div class="line"><span class="lineno"> 21</span> <span class="keywordflow">for</span> (i = 0; i &lt; LEN; i++) {</div>
<div class="line"><span class="lineno"> 22</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; arr[i] &lt;&lt; <span class="stringliteral">&quot;, &quot;</span>;</div>
<div class="line"><span class="lineno"> 23</span> }</div>
<div class="line"><span class="lineno"> 24</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 25</span>}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a63aaff7cabfa3da2da8b9477b5fad9d6">&#9670;&#160;</a></span>show_data() <span class="overload">[2/2]</span></h2>
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template&lt;typename T , size_t N&gt; </div>
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<td class="memname">void show_data </td>
<td>(</td>
<td class="paramtype">T(&amp;)&#160;</td>
<td class="paramname"><em>arr</em>[N]</td><td>)</td>
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<p>pretty print array </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">arr</td><td>array to print </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">N</td><td>length of array to print </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 32</span> {</div>
<div class="line"><span class="lineno"> 33</span> <a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a951127aea9d7e1e53ea9ae0868633246">show_data</a>(arr, N);</div>
<div class="line"><span class="lineno"> 34</span>}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a22ea0d1f7943ebb4371d31e44b465b6d">&#9670;&#160;</a></span>test_f()</h2>
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<td class="memname">void test_f </td>
<td>(</td>
<td class="paramtype">const int&#160;</td>
<td class="paramname"><em>NUM_DATA</em></td><td>)</td>
<td></td>
</tr>
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<p>Test implementation of shell_sort on float arrays by comparing results against <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a>. </p>
<div class="fragment"><div class="line"><span class="lineno"> 145</span> {</div>
<div class="line"><span class="lineno"> 146</span> <span class="comment">// int array = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 147</span> <span class="keywordtype">float</span> *<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a> = <span class="keyword">new</span> <span class="keywordtype">float</span>[NUM_DATA];</div>
<div class="line"><span class="lineno"> 148</span> <span class="keywordtype">float</span> *data2 = <span class="keyword">new</span> <span class="keywordtype">float</span>[NUM_DATA];</div>
<div class="line"><span class="lineno"> 149</span> <span class="comment">// int array2 = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 150</span> <span class="keywordtype">int</span> range = 1000;</div>
<div class="line"><span class="lineno"> 151</span> </div>
<div class="line"><span class="lineno"> 152</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; NUM_DATA; i++) {</div>
<div class="line"><span class="lineno"> 153</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] = data2[i] = ((<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - (range &gt;&gt; 1)) / 100.;</div>
<div class="line"><span class="lineno"> 154</span> }</div>
<div class="line"><span class="lineno"> 155</span> </div>
<div class="line"><span class="lineno"> 156</span> <span class="comment">/* sort using our implementation */</span></div>
<div class="line"><span class="lineno"> 157</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 158</span> <a class="code hl_function" href="../../d5/d91/namespacesorting.html#a5669396c6a6b1e14b97589b6e37980aa">shell_sort</a>(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 159</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 160</span> <span class="keywordtype">double</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) / CLOCKS_PER_SEC;</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;Time spent sorting using shell_sort2: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 162</span> &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 163</span> </div>
<div class="line"><span class="lineno"> 164</span> <span class="comment">/* sort using std::qsort */</span></div>
<div class="line"><span class="lineno"> 165</span> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 166</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a>(data2, NUM_DATA, <span class="keyword">sizeof</span>(data2[0]), <a class="code hl_struct" href="../../d1/db3/structcompare.html">compare&lt;float&gt;</a>);</div>
<div class="line"><span class="lineno"> 167</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 168</span> </div>
<div class="line"><span class="lineno"> 169</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 170</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;Time spent sorting using std::qsort: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 171</span> &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 172</span> </div>
<div class="line"><span class="lineno"> 173</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; NUM_DATA; i++) {</div>
<div class="line"><span class="lineno"> 174</span> assert(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] == data2[i]); <span class="comment">// ensure that our sorting results match</span></div>
<div class="line"><span class="lineno"> 175</span> <span class="comment">// the standard results</span></div>
<div class="line"><span class="lineno"> 176</span> }</div>
<div class="line"><span class="lineno"> 177</span> </div>
<div class="line"><span class="lineno"> 178</span> <span class="keyword">delete</span>[] <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>;</div>
<div class="line"><span class="lineno"> 179</span> <span class="keyword">delete</span>[] data2;</div>
<div class="line"><span class="lineno"> 180</span>}</div>
<div class="ttc" id="aqsort_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a></div><div class="ttdeci">T qsort(T... args)</div></div>
<div class="ttc" id="astructcompare_html"><div class="ttname"><a href="../../d1/db3/structcompare.html">compare</a></div><div class="ttdef"><b>Definition:</b> huffman.cpp:28</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a895b313cb2671e8f712040460325573e">&#9670;&#160;</a></span>test_int()</h2>
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<td class="memname">void test_int </td>
<td>(</td>
<td class="paramtype">const int&#160;</td>
<td class="paramname"><em>NUM_DATA</em></td><td>)</td>
<td></td>
</tr>
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<p>Test implementation of shell_sort on integer arrays by comparing results against <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a>. </p>
<div class="fragment"><div class="line"><span class="lineno"> 105</span> {</div>
<div class="line"><span class="lineno"> 106</span> <span class="comment">// int array = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 107</span> <span class="keywordtype">int</span> *<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a> = <span class="keyword">new</span> <span class="keywordtype">int</span>[NUM_DATA];</div>
<div class="line"><span class="lineno"> 108</span> <span class="keywordtype">int</span> *data2 = <span class="keyword">new</span> <span class="keywordtype">int</span>[NUM_DATA];</div>
<div class="line"><span class="lineno"> 109</span> <span class="comment">// int array2 = new int[NUM_DATA];</span></div>
<div class="line"><span class="lineno"> 110</span> <span class="keywordtype">int</span> range = 1800;</div>
<div class="line"><span class="lineno"> 111</span> </div>
<div class="line"><span class="lineno"> 112</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; NUM_DATA; i++)</div>
<div class="line"><span class="lineno"> 113</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] = data2[i] = (<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - (range &gt;&gt; 1);</div>
<div class="line"><span class="lineno"> 114</span> </div>
<div class="line"><span class="lineno"> 115</span> <span class="comment">/* sort using our implementation */</span></div>
<div class="line"><span class="lineno"> 116</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 117</span> <a class="code hl_function" href="../../d5/d91/namespacesorting.html#a5669396c6a6b1e14b97589b6e37980aa">shell_sort</a>(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 118</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock_t.html">std::clock_t</a> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 119</span> <span class="keywordtype">double</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 120</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;Time spent sorting using shell_sort2: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 121</span> &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 122</span> </div>
<div class="line"><span class="lineno"> 123</span> <span class="comment">/* sort using std::qsort */</span></div>
<div class="line"><span class="lineno"> 124</span> start = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 125</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/qsort.html">std::qsort</a>(data2, NUM_DATA, <span class="keyword">sizeof</span>(data2[0]), <a class="code hl_struct" href="../../d1/db3/structcompare.html">compare&lt;int&gt;</a>);</div>
<div class="line"><span class="lineno"> 126</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/clock.html">std::clock</a>();</div>
<div class="line"><span class="lineno"> 127</span> </div>
<div class="line"><span class="lineno"> 128</span> elapsed_time = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 129</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;Time spent sorting using std::qsort: &quot;</span> &lt;&lt; elapsed_time</div>
<div class="line"><span class="lineno"> 130</span> &lt;&lt; <span class="stringliteral">&quot;s\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 131</span> </div>
<div class="line"><span class="lineno"> 132</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; NUM_DATA; i++) {</div>
<div class="line"><span class="lineno"> 133</span> assert(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>[i] == data2[i]); <span class="comment">// ensure that our sorting results match</span></div>
<div class="line"><span class="lineno"> 134</span> <span class="comment">// the standard results</span></div>
<div class="line"><span class="lineno"> 135</span> }</div>
<div class="line"><span class="lineno"> 136</span> </div>
<div class="line"><span class="lineno"> 137</span> <span class="keyword">delete</span>[] <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>;</div>
<div class="line"><span class="lineno"> 138</span> <span class="keyword">delete</span>[] data2;</div>
<div class="line"><span class="lineno"> 139</span>}</div>
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