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C-Plus-Plus/d4/dd2/namespacequadratic__probing.html
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<div class="title">quadratic_probing Namespace Reference<div class="ingroups"><a class="el" href="../../d4/d39/group__open__addressing.html">Open Addressing</a></div></div> </div>
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<p>An implementation of hash table using <a href="https://en.wikipedia.org/wiki/Quadratic_probing">quadratic probing</a> algorithm.
<a href="../../d4/dd2/namespacequadratic__probing.html#details">More...</a></p>
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Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a></td></tr>
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using&#160;</td><td class="memItemRight" valign="bottom"><b>Entry</b> = struct <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a></td></tr>
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Functions</h2></td></tr>
<tr class="memitem:adccc63a7e57cc6dba75bd62f40feb88b"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dd2/namespacequadratic__probing.html#adccc63a7e57cc6dba75bd62f40feb88b">putProber</a> (const <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> &amp;entry, int key)</td></tr>
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<tr class="memitem:a00ebcc6d39653eccc26f8432efbfc8d9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dd2/namespacequadratic__probing.html#a00ebcc6d39653eccc26f8432efbfc8d9">add</a> (int key)</td></tr>
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<tr class="memitem:ab431981b54c0bae1b2956f716aee1dcf"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dd2/namespacequadratic__probing.html#ab431981b54c0bae1b2956f716aee1dcf">quadraticProbe</a> (int key, bool searching)</td></tr>
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<tr class="memitem:a5ceee4128d92ca4412040b7104d1299d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dd2/namespacequadratic__probing.html#a5ceee4128d92ca4412040b7104d1299d">find</a> (int key)</td></tr>
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<tr class="memitem:a40d617ebf4d6ba21bcda8d8d1faa2357"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dd2/namespacequadratic__probing.html#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a> ()</td></tr>
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<tr class="memitem:ada6f1f44f7e83b0094fbcbe170788486"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dd2/namespacequadratic__probing.html#ada6f1f44f7e83b0094fbcbe170788486">rehash</a> ()</td></tr>
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<tr class="memitem:a07a0467b24102260fbb6b554c453c20a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dd2/namespacequadratic__probing.html#a07a0467b24102260fbb6b554c453c20a">remove</a> (int key)</td></tr>
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<tr class="memitem:a69fe1f7c36fe004ba83eef2ca82e7e30"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/dd2/namespacequadratic__probing.html#a69fe1f7c36fe004ba83eef2ca82e7e30">removalInfo</a> (int key)</td></tr>
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Variables</h2></td></tr>
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int&#160;</td><td class="memItemRight" valign="bottom"><b>notPresent</b></td></tr>
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<tr class="memitem:a149e32e186c3fac390ffa81dd6c73147"><td class="memItemLeft" align="right" valign="top"><a id="a149e32e186c3fac390ffa81dd6c73147"></a>
<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>table</b></td></tr>
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int&#160;</td><td class="memItemRight" valign="bottom"><b>totalSize</b></td></tr>
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int&#160;</td><td class="memItemRight" valign="bottom"><b>tomb</b> = -1</td></tr>
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int&#160;</td><td class="memItemRight" valign="bottom"><b>size</b></td></tr>
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<tr class="memitem:ad20bb8020424def88917e26979051fae"><td class="memItemLeft" align="right" valign="top"><a id="ad20bb8020424def88917e26979051fae"></a>
bool&#160;</td><td class="memItemRight" valign="bottom"><b>rehashing</b></td></tr>
<tr class="separator:ad20bb8020424def88917e26979051fae"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>An implementation of hash table using <a href="https://en.wikipedia.org/wiki/Quadratic_probing">quadratic probing</a> algorithm. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a00ebcc6d39653eccc26f8432efbfc8d9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a00ebcc6d39653eccc26f8432efbfc8d9">&#9670;&nbsp;</a></span>add()</h2>
<div class="memitem">
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<td class="memname">void quadratic_probing::add </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em></td><td>)</td>
<td></td>
</tr>
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</div><div class="memdoc">
<p>Checks for load factor here </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key value to hash and add to table </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; {</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; <span class="keywordtype">int</span> index = <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#ab431981b54c0bae1b2956f716aee1dcf">quadraticProbe</a>(key, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; table[index].key = key;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <span class="comment">// Load factor greater than 0.5 causes resizing</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; <span class="keywordflow">if</span> (++size / <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(totalSize) &gt;= 0.5) {</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#ada6f1f44f7e83b0094fbcbe170788486">rehash</a>();</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; }</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a312143ed316d48978084c025ff8d9768">&#9670;&nbsp;</a></span>addInfo()</h2>
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<td class="memname">void quadratic_probing::addInfo </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Information about the adding process </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key value to hash and add to table </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; {</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Initial table: &quot;</span>;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a>();</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;hash of &quot;</span> &lt;&lt; key &lt;&lt; <span class="stringliteral">&quot; is &quot;</span> &lt;&lt; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key) &lt;&lt; <span class="stringliteral">&quot; % &quot;</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; &lt;&lt; totalSize &lt;&lt; <span class="stringliteral">&quot; == &quot;</span> &lt;&lt; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key) % totalSize;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <a class="code" href="../../de/d47/string__fibonacci_8cpp.html#a28052eee05d43c2ebc5147c52bd50c35">add</a>(key);</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;New table: &quot;</span>;</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a>();</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a40d617ebf4d6ba21bcda8d8d1faa2357">&#9670;&nbsp;</a></span>display()</h2>
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<td class="memname">void quadratic_probing::display </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Displays the table </p><dl class="section return"><dt>Returns</dt><dd>None </dd></dl>
<div class="fragment"><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; {</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; totalSize; i++) {</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; <span class="keywordflow">if</span> (table[i].key == notPresent) {</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; Empty &quot;</span>;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (table[i].key == tomb) {</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; Tomb &quot;</span>;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; table[i].key;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; }</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a5ceee4128d92ca4412040b7104d1299d">&#9670;&nbsp;</a></span>find()</h2>
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<td class="memname"><a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> quadratic_probing::find </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em></td><td>)</td>
<td></td>
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<p>Get the entry instance corresponding to a key </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key value to search/probe </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>if present, the entry instance </dd>
<dd>
if not present, a new instance </dd></dl>
<div class="fragment"><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; {</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; <span class="keywordtype">int</span> index = <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#ab431981b54c0bae1b2956f716aee1dcf">quadraticProbe</a>(key, <span class="keyword">true</span>);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; <span class="keywordflow">if</span> (index == notPresent) {</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; <span class="keywordflow">return</span> <a class="code" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a>();</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; }</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; <span class="keywordflow">return</span> table[index];</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a2093d91dd3d377cf0a5c939e45dcefc7">&#9670;&nbsp;</a></span>hashFxn()</h2>
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<td class="memname">size_t quadratic_probing::hashFxn </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em></td><td>)</td>
<td></td>
</tr>
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<p>Hash a key </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key value to hash </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>hash of the key </dd></dl>
<div class="fragment"><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/utility/hash.html">std::hash&lt;int&gt;</a> hash;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="keywordflow">return</span> hash(key);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#adccc63a7e57cc6dba75bd62f40feb88b">&#9670;&nbsp;</a></span>putProber()</h2>
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<td class="memname">bool quadratic_probing::putProber </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> &amp;&#160;</td>
<td class="paramname"><em>entry</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Finds empty spot </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">entry</td><td>Instance of table entry </td></tr>
<tr><td class="paramname">key</td><td>key value to search/probe </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>true</code> if key is present </dd>
<dd>
<code>false</code> if key is absent </dd></dl>
<div class="fragment"><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; {</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="keywordflow">if</span> (entry.<a class="code" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> == notPresent || entry.<a class="code" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> == tomb) {</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; }</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ab431981b54c0bae1b2956f716aee1dcf">&#9670;&nbsp;</a></span>quadraticProbe()</h2>
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<td class="memname">int quadratic_probing::quadraticProbe </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool&#160;</td>
<td class="paramname"><em>searching</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<p>Performs quadratic probing to resolve collisions </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key value to search/probe </td></tr>
<tr><td class="paramname">searching</td><td><code>true</code> if only searching, <code>false1 if assigning @returns value of</code>notPresent`. </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; {</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordtype">int</span> hash = <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(<a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key));</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keywordtype">int</span> i = 0;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <a class="code" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> entry;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keywordtype">size_t</span> index =</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; (hash + <span class="keyword">static_cast&lt;</span><span class="keywordtype">size_t</span><span class="keyword">&gt;</span>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/math/round.html">std::round</a>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/math/pow.html">std::pow</a>(i, 2)))) %</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; totalSize;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; entry = table[index];</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keywordflow">if</span> (searching) {</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keywordflow">if</span> (entry.<a class="code" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> == notPresent) {</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keywordflow">return</span> notPresent;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; }</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="../../d4/dd2/namespacequadratic__probing.html#aeb6bca8db4768226f8ea8291ea4f83f6">searchingProber</a>(entry, key)) {</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Found key!&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keywordflow">return</span> index;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; }</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Found tombstone or equal hash, checking next&quot;</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; i++;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="../../d4/dd2/namespacequadratic__probing.html#adccc63a7e57cc6dba75bd62f40feb88b">putProber</a>(entry, key)) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">if</span> (!rehashing) {</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Spot found!&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; }</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordflow">return</span> index;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; }</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keywordflow">if</span> (!rehashing) {</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Spot taken, looking at next (next index = &quot;</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; &lt;&lt; (hash + <span class="keyword">static_cast&lt;</span><span class="keywordtype">size_t</span><span class="keyword">&gt;</span>(</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/math/round.html">std::round</a>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/math/pow.html">std::pow</a>(i + 1, 2)))) %</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; totalSize</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; i++;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; }</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordflow">if</span> (i == totalSize * 100) {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Quadratic probe failed (infinite loop)&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keywordflow">return</span> notPresent;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; }</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; } <span class="keywordflow">while</span> (entry.<a class="code" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> != notPresent);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keywordflow">return</span> notPresent;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ada6f1f44f7e83b0094fbcbe170788486">&#9670;&nbsp;</a></span>rehash()</h2>
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<td class="memname">void quadratic_probing::rehash </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Rehashes the table into a bigger table </p><dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
<div class="fragment"><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; {</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; <span class="comment">// Necessary so wall of add info isn&#39;t printed all at once</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; rehashing = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; <span class="keywordtype">int</span> oldSize = totalSize;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;Entry&gt;</a> oldTable(table);</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; <span class="comment">// Really this should use the next prime number greater than totalSize * 2</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; totalSize *= 2;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; table = <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;Entry&gt;</a>(totalSize);</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; oldSize; i++) {</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; <span class="keywordflow">if</span> (oldTable[i].key != -1 &amp;&amp; oldTable[i].key != notPresent) {</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; size--; <span class="comment">// Size stays the same (add increments size)</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <a class="code" href="../../de/d47/string__fibonacci_8cpp.html#a28052eee05d43c2ebc5147c52bd50c35">add</a>(oldTable[i].key);</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; }</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; }</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; <span class="comment">// delete[] oldTable;</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; rehashing = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Table was rehashed, new size is: &quot;</span> &lt;&lt; totalSize &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a69fe1f7c36fe004ba83eef2ca82e7e30">&#9670;&nbsp;</a></span>removalInfo()</h2>
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<td class="memname">void quadratic_probing::removalInfo </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em></td><td>)</td>
<td></td>
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<p>Information about removal process </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key value to hash and remove from table </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; {</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Initial table: &quot;</span>;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a>();</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;hash of &quot;</span> &lt;&lt; key &lt;&lt; <span class="stringliteral">&quot; is &quot;</span> &lt;&lt; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key) &lt;&lt; <span class="stringliteral">&quot; % &quot;</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; &lt;&lt; totalSize &lt;&lt; <span class="stringliteral">&quot; == &quot;</span> &lt;&lt; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key) % totalSize;</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a07a0467b24102260fbb6b554c453c20a">remove</a>(key);</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;New table: &quot;</span>;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a>();</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a07a0467b24102260fbb6b554c453c20a">&#9670;&nbsp;</a></span>remove()</h2>
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<td class="memname">void quadratic_probing::remove </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em></td><td>)</td>
<td></td>
</tr>
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<p>Removes key. Leaves tombstone upon removal. </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key value to hash and remove from table </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; {</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="keywordtype">int</span> index = <a class="code" href="../../d4/dd2/namespacequadratic__probing.html#ab431981b54c0bae1b2956f716aee1dcf">quadraticProbe</a>(key, <span class="keyword">true</span>);</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; <span class="keywordflow">if</span> (index == notPresent) {</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;key not found&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; }</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; table[index].key = tomb;</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Removal successful, leaving tombstone&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; size--;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#aeb6bca8db4768226f8ea8291ea4f83f6">&#9670;&nbsp;</a></span>searchingProber()</h2>
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<td class="memname">bool quadratic_probing::searchingProber </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> &amp;&#160;</td>
<td class="paramname"><em>entry</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>key</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Looks for a matching key </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">entry</td><td>Instance of table entry </td></tr>
<tr><td class="paramname">key</td><td>key value to search/probe </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><code>true</code> if key matches the entry </dd>
<dd>
<code>false</code> if key does not match the entry </dd></dl>
<div class="fragment"><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; {</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="keywordflow">if</span> (entry.<a class="code" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> == key) {</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; }</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;}</div>
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<div class="ttc" id="avector_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a></div><div class="ttdoc">STL class.</div></div>
<div class="ttc" id="anamespacequadratic__probing_html_adccc63a7e57cc6dba75bd62f40feb88b"><div class="ttname"><a href="../../d4/dd2/namespacequadratic__probing.html#adccc63a7e57cc6dba75bd62f40feb88b">quadratic_probing::putProber</a></div><div class="ttdeci">bool putProber(const Entry &amp;entry, int key)</div><div class="ttdef"><b>Definition:</b> quadratic_probing_hash_table.cpp:106</div></div>
<div class="ttc" id="anamespacequadratic__probing_html_a40d617ebf4d6ba21bcda8d8d1faa2357"><div class="ttname"><a href="../../d4/dd2/namespacequadratic__probing.html#a40d617ebf4d6ba21bcda8d8d1faa2357">quadratic_probing::display</a></div><div class="ttdeci">void display()</div><div class="ttdef"><b>Definition:</b> quadratic_probing_hash_table.cpp:142</div></div>
<div class="ttc" id="astructquadratic__probing_1_1_entry_html"><div class="ttname"><a href="../../da/dd1/structquadratic__probing_1_1_entry.html">quadratic_probing::Entry</a></div><div class="ttdef"><b>Definition:</b> quadratic_probing_hash_table.cpp:37</div></div>
<div class="ttc" id="anamespacequadratic__probing_html_a07a0467b24102260fbb6b554c453c20a"><div class="ttname"><a href="../../d4/dd2/namespacequadratic__probing.html#a07a0467b24102260fbb6b554c453c20a">quadratic_probing::remove</a></div><div class="ttdeci">void remove(int key)</div><div class="ttdef"><b>Definition:</b> quadratic_probing_hash_table.cpp:194</div></div>
<div class="ttc" id="astructquadratic__probing_1_1_entry_html_a75f72858f08a2fc8b94402de98db12d8"><div class="ttname"><a href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">quadratic_probing::Entry::key</a></div><div class="ttdeci">int key</div><div class="ttdoc">key value</div><div class="ttdef"><b>Definition:</b> quadratic_probing_hash_table.cpp:39</div></div>
<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="around_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/math/round.html">std::round</a></div><div class="ttdeci">T round(T... args)</div></div>
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<div class="ttc" id="anamespacequadratic__probing_html_a2093d91dd3d377cf0a5c939e45dcefc7"><div class="ttname"><a href="../../d4/dd2/namespacequadratic__probing.html#a2093d91dd3d377cf0a5c939e45dcefc7">quadratic_probing::hashFxn</a></div><div class="ttdeci">size_t hashFxn(int key)</div><div class="ttdef"><b>Definition:</b> quadratic_probing_hash_table.cpp:46</div></div>
<div class="ttc" id="anamespacequadratic__probing_html_ab431981b54c0bae1b2956f716aee1dcf"><div class="ttname"><a href="../../d4/dd2/namespacequadratic__probing.html#ab431981b54c0bae1b2956f716aee1dcf">quadratic_probing::quadraticProbe</a></div><div class="ttdeci">int quadraticProbe(int key, bool searching)</div><div class="ttdef"><b>Definition:</b> quadratic_probing_hash_table.cpp:56</div></div>
<div class="ttc" id="anamespacequadratic__probing_html_aeb6bca8db4768226f8ea8291ea4f83f6"><div class="ttname"><a href="../../d4/dd2/namespacequadratic__probing.html#aeb6bca8db4768226f8ea8291ea4f83f6">quadratic_probing::searchingProber</a></div><div class="ttdeci">bool searchingProber(const Entry &amp;entry, int key)</div><div class="ttdef"><b>Definition:</b> quadratic_probing_hash_table.cpp:119</div></div>
<div class="ttc" id="ahash_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/hash.html">std::hash</a></div></div>
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