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<a href="../../d5/df4/merge__sort_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span></div>
<div class="foldopen" id="foldopen00037" data-start="{" data-end="}">
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="../../d5/d4c/group__sorting.html#ga460c61cd948203b4816bef2accb3fc73"> 37</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#ga460c61cd948203b4816bef2accb3fc73">merge</a>(<span class="keywordtype">int</span> *arr, <span class="keywordtype">int</span> l, <span class="keywordtype">int</span> m, <span class="keywordtype">int</span> r) {</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keywordtype">int</span> n1 = m - l + 1;</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="keywordtype">int</span> n2 = r - m;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> std::vector&lt;int&gt; L(n1), R(n2);</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> </div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; n1; i++) L[i] = arr[l + i];</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; n2; j++) R[j] = arr[m + 1 + j];</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordtype">int</span> i = 0, j = 0, k = l;</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="keywordflow">while</span> (i &lt; n1 &amp;&amp; j &lt; n2) {</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">if</span> (L[i] &lt;= R[j]) {</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> arr[k] = L[i];</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> i++;</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> arr[k] = R[j];</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> j++;</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> }</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> k++;</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> }</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> </div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">while</span> (i &lt; n1) {</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> arr[k] = L[i];</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> i++;</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> k++;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> }</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">while</span> (j &lt; n2) {</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> arr[k] = R[j];</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> j++;</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> k++;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> }</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span>}</div>
</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span></div>
<div class="foldopen" id="foldopen00082" data-start="{" data-end="}">
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"><a class="line" href="../../d5/d4c/group__sorting.html#gab6b14fea48d9841e29b9fc26be6e05d7"> 82</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#gab6b14fea48d9841e29b9fc26be6e05d7">mergeSort</a>(<span class="keywordtype">int</span> *arr, <span class="keywordtype">int</span> l, <span class="keywordtype">int</span> r) {</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">if</span> (l &lt; r) {</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keywordtype">int</span> m = l + (r - l) / 2;</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#gab6b14fea48d9841e29b9fc26be6e05d7">mergeSort</a>(arr, l, m);</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#gab6b14fea48d9841e29b9fc26be6e05d7">mergeSort</a>(arr, m + 1, r);</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#ga460c61cd948203b4816bef2accb3fc73">merge</a>(arr, l, m, r);</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> }</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span>}</div>
</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span></div>
<div class="foldopen" id="foldopen00095" data-start="{" data-end="}">
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"><a class="line" href="../../d5/d4c/group__sorting.html#ga0a9a57a1f1bbba3d4822531d002b7e07"> 95</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#ga0a9a57a1f1bbba3d4822531d002b7e07">show</a>(<span class="keywordtype">int</span> *arr, <span class="keywordtype">int</span> size) {</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; size; i++) std::cout &lt;&lt; arr[i] &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span>}</div>
</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span></div>
<div class="foldopen" id="foldopen00101" data-start="{" data-end="}">
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"><a class="line" href="../../d5/d4c/group__sorting.html#gae66f6b31b5ad750f1fe042a706a4e3d4"> 101</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#gae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keywordtype">int</span> size;</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Enter the number of elements: &quot;</span>;</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> std::cin &gt;&gt; size;</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> </div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="keywordflow">if</span> (size &lt;= 0) {</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Invalid size.\n&quot;</span>;</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keywordflow">return</span> 1;</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> }</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> </div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keywordtype">int</span> *arr = <span class="keyword">new</span> <span class="keywordtype">int</span>[size];</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Enter the unsorted elements: &quot;</span>;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; size; ++i) {</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> std::cin &gt;&gt; arr[i];</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> }</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#gab6b14fea48d9841e29b9fc26be6e05d7">mergeSort</a>(arr, 0, size - 1);</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Sorted array: &quot;</span>;</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <a class="code hl_function" href="../../d5/d4c/group__sorting.html#ga0a9a57a1f1bbba3d4822531d002b7e07">show</a>(arr, size);</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="keyword">delete</span>[] arr;</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span>}</div>
</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span></div>
<div class="ttc" id="agroup__sorting_html_ga0a9a57a1f1bbba3d4822531d002b7e07"><div class="ttname"><a href="../../d5/d4c/group__sorting.html#ga0a9a57a1f1bbba3d4822531d002b7e07">show</a></div><div class="ttdeci">void show(int *arr, int size)</div><div class="ttdef"><b>Definition</b> <a href="#l00095">merge_sort.cpp:95</a></div></div>
<div class="ttc" id="agroup__sorting_html_ga460c61cd948203b4816bef2accb3fc73"><div class="ttname"><a href="../../d5/d4c/group__sorting.html#ga460c61cd948203b4816bef2accb3fc73">merge</a></div><div class="ttdeci">void merge(int *arr, int l, int m, int r)</div><div class="ttdef"><b>Definition</b> <a href="#l00037">merge_sort.cpp:37</a></div></div>
<div class="ttc" id="agroup__sorting_html_gab6b14fea48d9841e29b9fc26be6e05d7"><div class="ttname"><a href="../../d5/d4c/group__sorting.html#gab6b14fea48d9841e29b9fc26be6e05d7">mergeSort</a></div><div class="ttdeci">void mergeSort(int *arr, int l, int r)</div><div class="ttdef"><b>Definition</b> <a href="#l00082">merge_sort.cpp:82</a></div></div>
<div class="ttc" id="agroup__sorting_html_gae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../d5/d4c/group__sorting.html#gae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdef"><b>Definition</b> <a href="#l00101">merge_sort.cpp:101</a></div></div>
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