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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>
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<div class="line"><span class="lineno"> 219</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Unsorted original data: &quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 220</span> <a class="code hl_function" href="#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> std::clock_t start = std::clock();</div>
<div class="line"><span class="lineno"> 222</span> shell_sort(<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"> 222</span> <a class="code hl_function" href="#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> std::clock_t end = std::clock();</div>
<div class="line"><span class="lineno"> 224</span> </div>
<div class="line"><span class="lineno"> 225</span> std::cout &lt;&lt; std::endl</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a5669396c6a6b1e14b97589b6e37980aa">&#9670;&#160;</a></span>shell_sort()</h2>
<div class="memitem">
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template&lt;typename T&gt; </div>
<table class="memname">
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<td class="memname">void sorting::shell_sort </td>
<td>(</td>
<td class="paramtype">T *</td> <td class="paramname"><span class="paramname"><em>arr</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">size_t</td> <td class="paramname"><span class="paramname"><em>LEN</em></span>&#160;)</td>
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<p>Optimized algorithm - takes half the time by utilizing Mar </p>
<p class="definition">Definition at line <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html#l00045">45</a> of file <a class="el" href="../../d4/d7a/shell__sort2_8cpp_source.html">shell_sort2.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 45</span> {</div>
<div class="line"><span class="lineno"> 46</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> gaps[] = {701, 301, 132, 57, 23, 10, 4, 1};</div>
<div class="line"><span class="lineno"> 47</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> gap_len = 8;</div>
<div class="line"><span class="lineno"> 48</span> <span class="keywordtype">size_t</span> i, j, <a class="code hl_function" href="../../d4/d18/composite__simpson__rule_8cpp.html#a2f67508d5f392b0321772169342c98ad">g</a>;</div>
<div class="line"><span class="lineno"> 49</span> </div>
<div class="line"><span class="lineno"> 50</span> <span class="keywordflow">for</span> (g = 0; <a class="code hl_function" href="../../d4/d18/composite__simpson__rule_8cpp.html#a2f67508d5f392b0321772169342c98ad">g</a> &lt; gap_len; <a class="code hl_function" href="../../d4/d18/composite__simpson__rule_8cpp.html#a2f67508d5f392b0321772169342c98ad">g</a>++) {</div>
<div class="line"><span class="lineno"> 51</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> gap = gaps[<a class="code hl_function" href="../../d4/d18/composite__simpson__rule_8cpp.html#a2f67508d5f392b0321772169342c98ad">g</a>];</div>
<div class="line"><span class="lineno"> 52</span> <span class="keywordflow">for</span> (i = gap; i &lt; LEN; i++) {</div>
<div class="line"><span class="lineno"> 53</span> T tmp = arr[i];</div>
<div class="line"><span class="lineno"> 54</span> </div>
<div class="line"><span class="lineno"> 55</span> <span class="keywordflow">for</span> (j = i; j &gt;= gap &amp;&amp; (arr[j - gap] - tmp) &gt; 0; j -= gap) {</div>
<div class="line"><span class="lineno"> 56</span> arr[j] = arr[j - gap];</div>
<div class="line"><span class="lineno"> 57</span> }</div>
<div class="line"><span class="lineno"> 58</span> </div>
<div class="line"><span class="lineno"> 59</span> arr[j] = tmp;</div>
<div class="line"><span class="lineno"> 60</span> }</div>
<div class="line"><span class="lineno"> 61</span> }</div>
<div class="line"><span class="lineno"> 62</span>}</div>
<div class="ttc" id="acomposite__simpson__rule_8cpp_html_a2f67508d5f392b0321772169342c98ad"><div class="ttname"><a href="../../d4/d18/composite__simpson__rule_8cpp.html#a2f67508d5f392b0321772169342c98ad">numerical_methods::simpson_method::g</a></div><div class="ttdeci">double g(double x)</div><div class="ttdoc">Another test function.</div><div class="ttdef"><b>Definition</b> <a href="../../d4/d18/composite__simpson__rule_8cpp_source.html#l00115">composite_simpson_rule.cpp:115</a></div></div>
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@@ -403,7 +452,7 @@ template&lt;typename T , size_t N&gt; </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> std::clock_t start = std::clock();</div>
<div class="line"><span class="lineno"> 158</span> shell_sort(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 158</span> <a class="code hl_function" href="#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> std::clock_t end = std::clock();</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>(end - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 161</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using shell_sort2: &quot;</span> &lt;&lt; elapsed_time</div>
@@ -459,7 +508,7 @@ template&lt;typename T , size_t N&gt; </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> std::clock_t start = std::clock();</div>
<div class="line"><span class="lineno"> 117</span> shell_sort(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>, NUM_DATA);</div>
<div class="line"><span class="lineno"> 117</span> <a class="code hl_function" href="#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> std::clock_t end = std::clock();</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>(end - start) / CLOCKS_PER_SEC;</div>
<div class="line"><span class="lineno"> 120</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Time spent sorting using shell_sort2: &quot;</span> &lt;&lt; elapsed_time</div>
@@ -491,7 +540,7 @@ template&lt;typename T , size_t N&gt; </div>
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