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<div class="headertitle"><div class="title">queue_using_linkedlist.cpp</div></div>
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<div class="contents">
<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> Write a program to implement Queue using linkedlist.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">*/</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span> </div>
<div class="foldopen" id="foldopen00006" data-start="{" data-end="};">
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"><a class="line" href="../../d0/dff/structlinkedlist.html"> 6</a></span><span class="keyword">struct </span><a class="code hl_struct" href="../../d0/dff/structlinkedlist.html">linkedlist</a> {</div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> <span class="keywordtype">int</span> data;</div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span> <a class="code hl_struct" href="../../d0/dff/structlinkedlist.html">linkedlist</a> *next;</div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span>};</div>
</div>
<div class="foldopen" id="foldopen00010" data-start="{" data-end="};">
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"><a class="line" href="../../d2/dc4/classstack__linked_list.html"> 10</a></span><span class="keyword">class </span><a class="code hl_class" href="../../d2/dc4/classstack__linked_list.html">stack_linkedList</a> {</div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> <a class="code hl_struct" href="../../d0/dff/structlinkedlist.html">linkedlist</a> *front;</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> <a class="code hl_struct" href="../../d0/dff/structlinkedlist.html">linkedlist</a> *rear;</div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> <a class="code hl_class" href="../../d2/dc4/classstack__linked_list.html">stack_linkedList</a>() { front = rear = NULL; }</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> <span class="keywordtype">void</span> enqueue(<span class="keywordtype">int</span>);</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> <span class="keywordtype">int</span> dequeue();</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="keywordtype">void</span> display();</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span>};</div>
</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="keywordtype">void</span> stack_linkedList::enqueue(<span class="keywordtype">int</span> ele) {</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <a class="code hl_struct" href="../../d0/dff/structlinkedlist.html">linkedlist</a> *temp = <span class="keyword">new</span> <a class="code hl_struct" href="../../d0/dff/structlinkedlist.html">linkedlist</a>();</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> temp-&gt;data = ele;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> temp-&gt;next = NULL;</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <span class="keywordflow">if</span> (front == NULL)</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> front = rear = temp;</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> rear-&gt;next = temp;</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> rear = temp;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> }</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span>}</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="keywordtype">int</span> stack_linkedList::dequeue() {</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <a class="code hl_struct" href="../../d0/dff/structlinkedlist.html">linkedlist</a> *temp;</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keywordtype">int</span> ele;</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keywordflow">if</span> (front == NULL)</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\nStack is empty&quot;</span>;</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> temp = front;</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> ele = temp-&gt;data;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keywordflow">if</span> (front == rear) <span class="comment">// if length of queue is 1;</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> rear = rear-&gt;next;</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> front = front-&gt;next;</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">delete</span> (temp);</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> }</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">return</span> ele;</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span>}</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="keywordtype">void</span> stack_linkedList::display() {</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="keywordflow">if</span> (front == NULL)</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\nStack is empty&quot;</span>;</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <a class="code hl_struct" href="../../d0/dff/structlinkedlist.html">linkedlist</a> *temp;</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> temp = front;</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">while</span> (temp != NULL) {</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> std::cout &lt;&lt; temp-&gt;data &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> temp = temp-&gt;next;</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>}</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> </div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span><span class="keywordtype">int</span> <a class="code hl_function" href="../../dd/d1e/generate__parentheses_8cpp.html#gae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordtype">int</span> op, <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <a class="code hl_class" href="../../d2/dc4/classstack__linked_list.html">stack_linkedList</a> ob;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\n1. enqueue(Insertion) &quot;</span>;</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\n2. dequeue(Deletion)&quot;</span>;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\n3. Display&quot;</span>;</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\n4. Exit&quot;</span>;</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> </div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keywordflow">while</span> (1) {</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\nEnter your choice &quot;</span>;</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> std::cin &gt;&gt; op;</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keywordflow">if</span> (op == 1) {</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Enter data &quot;</span>;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> std::cin &gt;&gt; <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>;</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> ob.enqueue(<a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a>);</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (op == 2)</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <a class="code hl_variable" href="../../d1/df3/hash__search_8cpp.html#a6e1a77282bc65ad359d753d25df23243">data</a> = ob.dequeue();</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (op == 3)</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> ob.display();</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (op == 4)</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> exit(0);</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> std::cout &lt;&lt; <span class="stringliteral">&quot;\nWrong choice &quot;</span>;</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> }</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span>}</div>
<div class="ttc" id="aclassstack__linked_list_html"><div class="ttname"><a href="../../d2/dc4/classstack__linked_list.html">stack_linkedList</a></div><div class="ttdef"><b>Definition</b> <a href="#l00010">queue_using_linkedlist.cpp:10</a></div></div>
<div class="ttc" id="agenerate__parentheses_8cpp_html_gae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../dd/d1e/generate__parentheses_8cpp.html#gae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdoc">Main function.</div><div class="ttdef"><b>Definition</b> <a href="../../dd/d1e/generate__parentheses_8cpp_source.html#l00110">generate_parentheses.cpp:110</a></div></div>
<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> <a href="../../d1/df3/hash__search_8cpp_source.html#l00024">hash_search.cpp:24</a></div></div>
<div class="ttc" id="astructlinkedlist_html"><div class="ttname"><a href="../../d0/dff/structlinkedlist.html">linkedlist</a></div><div class="ttdef"><b>Definition</b> <a href="#l00006">queue_using_linkedlist.cpp:6</a></div></div>
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