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<div class="headertitle"><div class="title">wave_sort.cpp File Reference</div></div>
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<p>Implementation of the <a href="https://www.geeksforgeeks.org/sort-array-wave-form-2/" target="_blank">Wave sort</a> algorithm.
<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;iostream&gt;</code><br />
<code>#include &lt;vector&gt;</code><br />
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Include dependency graph for wave_sort.cpp:</div>
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<p><a href="../../db/d3f/wave__sort_8cpp_source.html">Go to the source code of this file.</a></p>
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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>
<tr class="memdesc:d5/d91/namespacesorting"><td class="mdescLeft">&#160;</td><td class="mdescRight">for working with vectors <br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d9/d21/namespacewave__sort.html">wave_sort</a></td></tr>
<tr class="memdesc:d9/d21/namespacewave__sort"><td class="mdescLeft">&#160;</td><td class="mdescRight">Functions for the <a href="https://www.geeksforgeeks.org/sort-array-wave-form-2/" target="_blank">Wave sort</a> implementation. <br /></td></tr>
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Functions</h2></td></tr>
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<tr class="memitem:a7d4f243b9dc13ace4ef77e30dbc56f12"><td class="memTemplItemLeft" align="right" valign="top">std::vector&lt; T &gt;&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="#a7d4f243b9dc13ace4ef77e30dbc56f12">sorting::wave_sort::waveSort</a> (const std::vector&lt; T &gt; &amp;in_arr, int64_t n)</td></tr>
<tr class="memdesc:a7d4f243b9dc13ace4ef77e30dbc56f12"><td class="mdescLeft">&#160;</td><td class="mdescRight">The main function implements that implements the Wave Sort algorithm. <br /></td></tr>
<tr class="separator:a7d4f243b9dc13ace4ef77e30dbc56f12"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa8dca7b867074164d5f45b0f3851269d" id="r_aa8dca7b867074164d5f45b0f3851269d"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#aa8dca7b867074164d5f45b0f3851269d">test</a> ()</td></tr>
<tr class="memdesc:aa8dca7b867074164d5f45b0f3851269d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Self-test implementations. <br /></td></tr>
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<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>
<tr class="memdesc:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Main function. <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Implementation of the <a href="https://www.geeksforgeeks.org/sort-array-wave-form-2/" target="_blank">Wave sort</a> algorithm. </p>
<p>Wave Sort is a sorting algorithm that works in \(O(nlogn)\) time assuming the sort function used works in \(O(nlogn)\) time. </p><dl class="section author"><dt>Author</dt><dd><a href="https://github.com/Swastyy" target="_blank">Swastika Gupta</a> </dd></dl>
<p class="definition">Definition in file <a class="el" href="../../db/d3f/wave__sort_8cpp_source.html">wave_sort.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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<td class="memname">int main </td>
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<p>Main function. </p>
<dl class="section return"><dt>Returns</dt><dd>0 on exit </dd></dl>
<p class="definition">Definition at line <a class="el" href="../../db/d3f/wave__sort_8cpp_source.html#l00091">91</a> of file <a class="el" href="../../db/d3f/wave__sort_8cpp_source.html">wave_sort.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 91</span> {</div>
<div class="line"><span class="lineno"> 92</span> <a class="code hl_function" href="#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
<div class="line"><span class="lineno"> 93</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 94</span>}</div>
<div class="ttc" id="awave__sort_8cpp_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="#aa8dca7b867074164d5f45b0f3851269d">test</a></div><div class="ttdeci">static void test()</div><div class="ttdoc">Self-test implementations.</div><div class="ttdef"><b>Definition</b> <a href="../../db/d3f/wave__sort_8cpp_source.html#l00053">wave_sort.cpp:53</a></div></div>
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<a id="aa8dca7b867074164d5f45b0f3851269d" name="aa8dca7b867074164d5f45b0f3851269d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa8dca7b867074164d5f45b0f3851269d">&#9670;&#160;</a></span>test()</h2>
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<td class="memname">static void test </td>
<td>(</td>
<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
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<p>Self-test implementations. </p>
<dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
<p class="definition">Definition at line <a class="el" href="../../db/d3f/wave__sort_8cpp_source.html#l00053">53</a> of file <a class="el" href="../../db/d3f/wave__sort_8cpp_source.html">wave_sort.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 53</span> {</div>
<div class="line"><span class="lineno"> 54</span> <span class="comment">// [10, 90, 49, 2, 1, 5, 23] return [2, 1, 10, 5, 49, 23, 90]</span></div>
<div class="line"><span class="lineno"> 55</span> std::vector&lt;int64_t&gt; array1 = {10, 90, 49, 2, 1, 5, 23};</div>
<div class="line"><span class="lineno"> 56</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 1... &quot;</span>;</div>
<div class="line"><span class="lineno"> 57</span> std::vector&lt;int64_t&gt; arr1 = <a class="code hl_function" href="#a7d4f243b9dc13ace4ef77e30dbc56f12">sorting::wave_sort::waveSort</a>(array1, 7);</div>
<div class="line"><span class="lineno"> 58</span> <span class="keyword">const</span> std::vector&lt;int64_t&gt; o1 = {2, 1, 10, 5, 49, 23, 90};</div>
<div class="line"><span class="lineno"> 59</span> assert(arr1 == o1);</div>
<div class="line"><span class="lineno"> 60</span> std::cout &lt;&lt; <span class="stringliteral">&quot;passed&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 61</span> </div>
<div class="line"><span class="lineno"> 62</span> <span class="comment">// [1, 3, 4, 2, 7, 8] return [2, 1, 4, 3, 8, 7]</span></div>
<div class="line"><span class="lineno"> 63</span> std::vector&lt;int64_t&gt; array2 = {1, 3, 4, 2, 7, 8};</div>
<div class="line"><span class="lineno"> 64</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 2... &quot;</span>;</div>
<div class="line"><span class="lineno"> 65</span> std::vector&lt;int64_t&gt; arr2 = <a class="code hl_function" href="#a7d4f243b9dc13ace4ef77e30dbc56f12">sorting::wave_sort::waveSort</a>(array2, 6);</div>
<div class="line"><span class="lineno"> 66</span> <span class="keyword">const</span> std::vector&lt;int64_t&gt; o2 = {2, 1, 4, 3, 8, 7};</div>
<div class="line"><span class="lineno"> 67</span> assert(arr2 == o2);</div>
<div class="line"><span class="lineno"> 68</span> std::cout &lt;&lt; <span class="stringliteral">&quot;passed&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 69</span> </div>
<div class="line"><span class="lineno"> 70</span> <span class="comment">// [3, 3, 3, 3] return [3, 3, 3, 3]</span></div>
<div class="line"><span class="lineno"> 71</span> std::vector&lt;int64_t&gt; array3 = {3, 3, 3, 3};</div>
<div class="line"><span class="lineno"> 72</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 3... &quot;</span>;</div>
<div class="line"><span class="lineno"> 73</span> std::vector&lt;int64_t&gt; arr3 = <a class="code hl_function" href="#a7d4f243b9dc13ace4ef77e30dbc56f12">sorting::wave_sort::waveSort</a>(array3, 4);</div>
<div class="line"><span class="lineno"> 74</span> <span class="keyword">const</span> std::vector&lt;int64_t&gt; o3 = {3, 3, 3, 3};</div>
<div class="line"><span class="lineno"> 75</span> assert(arr3 == o3);</div>
<div class="line"><span class="lineno"> 76</span> std::cout &lt;&lt; <span class="stringliteral">&quot;passed&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 77</span> </div>
<div class="line"><span class="lineno"> 78</span> <span class="comment">// [9, 4, 6, 8, 14, 3] return [4, 3, 8, 6, 14, 9]</span></div>
<div class="line"><span class="lineno"> 79</span> std::vector&lt;int64_t&gt; array4 = {9, 4, 6, 8, 14, 3};</div>
<div class="line"><span class="lineno"> 80</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Test 4... &quot;</span>;</div>
<div class="line"><span class="lineno"> 81</span> std::vector&lt;int64_t&gt; arr4 = <a class="code hl_function" href="#a7d4f243b9dc13ace4ef77e30dbc56f12">sorting::wave_sort::waveSort</a>(array4, 6);</div>
<div class="line"><span class="lineno"> 82</span> <span class="keyword">const</span> std::vector&lt;int64_t&gt; o4 = {4, 3, 8, 6, 14, 9};</div>
<div class="line"><span class="lineno"> 83</span> assert(arr4 == o4);</div>
<div class="line"><span class="lineno"> 84</span> std::cout &lt;&lt; <span class="stringliteral">&quot;passed&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><span class="lineno"> 85</span>}</div>
<div class="ttc" id="awave__sort_8cpp_html_a7d4f243b9dc13ace4ef77e30dbc56f12"><div class="ttname"><a href="#a7d4f243b9dc13ace4ef77e30dbc56f12">sorting::wave_sort::waveSort</a></div><div class="ttdeci">std::vector&lt; T &gt; waveSort(const std::vector&lt; T &gt; &amp;in_arr, int64_t n)</div><div class="ttdoc">The main function implements that implements the Wave Sort algorithm.</div><div class="ttdef"><b>Definition</b> <a href="../../db/d3f/wave__sort_8cpp_source.html#l00034">wave_sort.cpp:34</a></div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a7d4f243b9dc13ace4ef77e30dbc56f12">&#9670;&#160;</a></span>waveSort()</h2>
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template&lt;typename T &gt; </div>
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<td class="paramtype">const std::vector&lt; T &gt; &amp;</td> <td class="paramname"><span class="paramname"><em>in_arr</em></span>, </td>
</tr>
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<td class="paramtype">int64_t</td> <td class="paramname"><span class="paramname"><em>n</em></span>&#160;)</td>
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<p>The main function implements that implements the Wave Sort algorithm. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">T</td><td>type of array </td></tr>
</table>
</dd>
</dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">in_arr</td><td>array to be sorted </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>arr the wave sorted array </dd></dl>
<p class="definition">Definition at line <a class="el" href="../../db/d3f/wave__sort_8cpp_source.html#l00034">34</a> of file <a class="el" href="../../db/d3f/wave__sort_8cpp_source.html">wave_sort.cpp</a>.</p>
<div class="fragment"><div class="line"><span class="lineno"> 34</span> {</div>
<div class="line"><span class="lineno"> 35</span> std::vector&lt;T&gt; arr(in_arr);</div>
<div class="line"><span class="lineno"> 36</span> </div>
<div class="line"><span class="lineno"> 37</span> <span class="keywordflow">for</span> (int64_t i = 0; i &lt; n; i++) {</div>
<div class="line"><span class="lineno"> 38</span> arr[i] = in_arr[i];</div>
<div class="line"><span class="lineno"> 39</span> }</div>
<div class="line"><span class="lineno"> 40</span> std::sort(arr.begin(), arr.end());</div>
<div class="line"><span class="lineno"> 41</span> <span class="keywordflow">for</span> (int64_t i = 0; i &lt; n - 1; i += 2) { <span class="comment">// swap all the adjacent elements</span></div>
<div class="line"><span class="lineno"> 42</span> std::swap(arr[i], arr[i + 1]);</div>
<div class="line"><span class="lineno"> 43</span> }</div>
<div class="line"><span class="lineno"> 44</span> <span class="keywordflow">return</span> arr;</div>
<div class="line"><span class="lineno"> 45</span>}</div>
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