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<p>Implementation of <a href="https://en.wikipedia.org/wiki/Pigeonhole_sort">Pigeonhole Sort algorithm</a>
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<a href="#details">More...</a></p>
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<div class="textblock"><code>#include <algorithm></code><br />
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<code>#include <array></code><br />
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<code>#include <cassert></code><br />
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<code>#include <iostream></code><br />
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Include dependency graph for pigeonhole_sort.cpp:</div>
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Namespaces</h2></td></tr>
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<tr class="memitem:d5/d91/namespacesorting"><td class="memItemLeft" align="right" valign="top">  </td><td class="memItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html">sorting</a></td></tr>
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<tr class="memdesc:d5/d91/namespacesorting"><td class="mdescLeft"> </td><td class="mdescRight">Sorting algorithms. <br /></td></tr>
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Functions</h2></td></tr>
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<tr class="memitem:a2f6a7a66934f345f86038a280234e706"><td class="memTemplParams" colspan="2">template<std::size_t N> </td></tr>
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<tr class="memitem:a2f6a7a66934f345f86038a280234e706"><td class="memTemplItemLeft" align="right" valign="top"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array</a>< int, N > </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="../../d5/d91/namespacesorting.html#a2f6a7a66934f345f86038a280234e706">sorting::pigeonSort</a> (<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array</a>< int, N > arr)</td></tr>
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<tr class="separator:a2f6a7a66934f345f86038a280234e706"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a34b8683a2b429de5cce57e6d733ec817"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/da8/pigeonhole__sort_8cpp.html#a34b8683a2b429de5cce57e6d733ec817">test_1</a> ()</td></tr>
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<tr class="separator:a34b8683a2b429de5cce57e6d733ec817"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a458410412185a5f09199deaff7157a8d"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/da8/pigeonhole__sort_8cpp.html#a458410412185a5f09199deaff7157a8d">test_2</a> ()</td></tr>
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<tr class="separator:a458410412185a5f09199deaff7157a8d"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:af31ec5409537703d9c8a47350386b32a"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/da8/pigeonhole__sort_8cpp.html#af31ec5409537703d9c8a47350386b32a">test_3</a> ()</td></tr>
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<tr class="separator:af31ec5409537703d9c8a47350386b32a"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/da8/pigeonhole__sort_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Implementation of <a href="https://en.wikipedia.org/wiki/Pigeonhole_sort">Pigeonhole Sort algorithm</a> </p>
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<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/Lownish">Lownish</a></dd></dl>
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<p>Pigeonhole sorting is a sorting algorithm that is suitable for sorting lists of elements where the number of elements and the number of possible key values are approximately the same. It requires O(n + Range) time where n is number of elements in input array and ‘Range’ is number of possible values in array.</p>
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<p>The time Complexity of the algorithm is \(O(n+N)\). </p>
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</div><h2 class="groupheader">Function Documentation</h2>
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<a id="ae66f6b31b5ad750f1fe042a706a4e3d4"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">◆ </a></span>main()</h2>
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<td class="memname">int main </td>
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<td>(</td>
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<td class="paramtype">void </td>
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<td></td>
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<p>Main function </p>
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<div class="fragment"><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  {</div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <a class="code" href="../../dd/da8/pigeonhole__sort_8cpp.html#a34b8683a2b429de5cce57e6d733ec817">test_1</a>();</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <a class="code" href="../../dd/da8/pigeonhole__sort_8cpp.html#a458410412185a5f09199deaff7157a8d">test_2</a>();</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <a class="code" href="../../dd/da8/pigeonhole__sort_8cpp.html#af31ec5409537703d9c8a47350386b32a">test_3</a>();</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  </div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> }</div>
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<div class="ttc" id="apigeonhole__sort_8cpp_html_a34b8683a2b429de5cce57e6d733ec817"><div class="ttname"><a href="../../dd/da8/pigeonhole__sort_8cpp.html#a34b8683a2b429de5cce57e6d733ec817">test_1</a></div><div class="ttdeci">static void test_1()</div><div class="ttdef"><b>Definition:</b> pigeonhole_sort.cpp:68</div></div>
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<div class="ttc" id="apigeonhole__sort_8cpp_html_a458410412185a5f09199deaff7157a8d"><div class="ttname"><a href="../../dd/da8/pigeonhole__sort_8cpp.html#a458410412185a5f09199deaff7157a8d">test_2</a></div><div class="ttdeci">static void test_2()</div><div class="ttdef"><b>Definition:</b> pigeonhole_sort.cpp:88</div></div>
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<div class="ttc" id="apigeonhole__sort_8cpp_html_af31ec5409537703d9c8a47350386b32a"><div class="ttname"><a href="../../dd/da8/pigeonhole__sort_8cpp.html#af31ec5409537703d9c8a47350386b32a">test_3</a></div><div class="ttdeci">static void test_3()</div><div class="ttdef"><b>Definition:</b> pigeonhole_sort.cpp:109</div></div>
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<div class="center"><iframe scrolling="no" frameborder="0" src="../../dd/da8/pigeonhole__sort_8cpp_ae66f6b31b5ad750f1fe042a706a4e3d4_cgraph.svg" width="318" height="190"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe>
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<a id="a34b8683a2b429de5cce57e6d733ec817"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a34b8683a2b429de5cce57e6d733ec817">◆ </a></span>test_1()</h2>
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<td class="memname">static void test_1 </td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>Test function 1 with unsorted array {8, 3, 2, 7, 4, 6, 8} </p><dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
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<div class="fragment"><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  {</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> n = 7;</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<int, n></a> test_array = {8, 3, 2, 7, 4, 6, 8};</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  test_array = sorting::pigeonSort<n>(test_array);</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  assert(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/is_sorted.html">std::is_sorted</a>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a>(test_array), <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(test_array)));</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="comment">// Printing sorted array</span></div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < n; i++) {</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << test_array.<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array/at.html">at</a>(i) << <span class="stringliteral">" "</span>;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  }</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"\nPassed\n"</span>;</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> }</div>
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<div class="ttc" id="aarray_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/array.html">std::array</a></div></div>
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<div class="ttc" id="aat_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/array/at.html">std::array::at</a></div><div class="ttdeci">T at(T... args)</div></div>
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<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="abegin_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a></div><div class="ttdeci">T begin(T... args)</div></div>
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<div class="ttc" id="aend_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a></div><div class="ttdeci">T end(T... args)</div></div>
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<div class="ttc" id="ais_sorted_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/is_sorted.html">std::is_sorted</a></div><div class="ttdeci">T is_sorted(T... args)</div></div>
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<div class="center"><iframe scrolling="no" frameborder="0" src="../../dd/da8/pigeonhole__sort_8cpp_a34b8683a2b429de5cce57e6d733ec817_cgraph.svg" width="219" height="190"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe>
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<h2 class="memtitle"><span class="permalink"><a href="#a458410412185a5f09199deaff7157a8d">◆ </a></span>test_2()</h2>
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<td class="memname">static void test_2 </td>
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<p>Test function 2 with unsorted array {802, 630, 20, 745, 52, 300, 612, 932, 78, 187} </p><dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
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<div class="fragment"><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  {</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> n = 10;</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<int, n></a> test_array = {802, 630, 20, 745, 52,</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  300, 612, 932, 78, 187};</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  </div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  test_array = sorting::pigeonSort<n>(test_array);</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  </div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  assert(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/is_sorted.html">std::is_sorted</a>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a>(test_array), <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(test_array)));</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// Printing sorted array</span></div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < n; i++) {</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << test_array.<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array/at.html">at</a>(i) << <span class="stringliteral">" "</span>;</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"\nPassed\n"</span>;</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> }</div>
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<div class="center"><iframe scrolling="no" frameborder="0" src="../../dd/da8/pigeonhole__sort_8cpp_a458410412185a5f09199deaff7157a8d_cgraph.svg" width="219" height="190"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe>
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<a id="af31ec5409537703d9c8a47350386b32a"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#af31ec5409537703d9c8a47350386b32a">◆ </a></span>test_3()</h2>
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<td class="memname">static void test_3 </td>
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<td>(</td>
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<td class="paramname"></td><td>)</td>
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<p>Test function 1 with unsorted array {11,13,12,14} </p><dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
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<div class="fragment"><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  {</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> n = 4;</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array.html">std::array<int, n></a> test_array = {11, 13, 12, 14};</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  test_array = sorting::pigeonSort<n>(test_array);</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  </div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  assert(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/is_sorted.html">std::is_sorted</a>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/begin.html">std::begin</a>(test_array), <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a>(test_array)));</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  </div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="comment">// Printing sorted array</span></div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < n; i++) {</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << test_array.<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/array/at.html">at</a>(i) << <span class="stringliteral">" "</span>;</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  }</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"\nPassed\n"</span>;</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> }</div>
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