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<div class="headertitle"><div class="title">interpolation_search2.cpp</div></div>
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<div class="contents">
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<a href="../../df/d39/interpolation__search2_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>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include <iostream></span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span></div>
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<div class="foldopen" id="foldopen00015" data-start="{" data-end="}">
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"><a class="line" href="../../df/d39/interpolation__search2_8cpp.html#aa3ec659ec8394d186c761df81ad1f629"> 15</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../df/d39/interpolation__search2_8cpp.html#aa3ec659ec8394d186c761df81ad1f629">InterpolationSearch</a>(<span class="keywordtype">int</span> A[], <span class="keywordtype">int</span> n, <span class="keywordtype">int</span> x) {</div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> <span class="keywordtype">int</span> low = 0;</div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> <span class="keywordtype">int</span> high = n - 1;</div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="keywordflow">while</span> (low <= high) {</div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> <span class="keywordtype">int</span> mid = low + (((high - 1) * (x - A[low])) / (A[high] - A[low]));</div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> <span class="keywordflow">if</span> (x == A[mid])</div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <span class="keywordflow">return</span> mid; <span class="comment">// Found x, return (exit)</span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (x < A[mid])</div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> high = mid - 1; <span class="comment">// X lies before mid</span></div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> <span class="keywordflow">else</span></div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> low = mid + 1; <span class="comment">// x lies after mid</span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> }</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keywordflow">return</span> -1;</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span>}</div>
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</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span></div>
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<div class="foldopen" id="foldopen00032" data-start="{" data-end="}">
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"><a class="line" href="../../df/d39/interpolation__search2_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 32</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../df/d39/interpolation__search2_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordtype">int</span> A[] = {2, 4, 5, 7, 13, 14, 15, 23};</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keywordtype">int</span> x = 17;</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span></div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keywordtype">int</span> index = <a class="code hl_function" href="../../df/d39/interpolation__search2_8cpp.html#aa3ec659ec8394d186c761df81ad1f629">InterpolationSearch</a>(A, 8, x);</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keywordflow">if</span> (index < 0)</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> std::cout << <span class="stringliteral">"Number "</span> << x << <span class="stringliteral">" not found"</span> << std::endl;</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keywordflow">else</span></div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> std::cout << <span class="stringliteral">"Number "</span> << x << <span class="stringliteral">" is at "</span> << index << std::endl;</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span>}</div>
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</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> </div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="comment">// randomly set x bcoz array was defined by us , therefore not reasonable for</span></div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="comment">// asking input. We could have asked for input if array elements were inputed by</span></div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="comment">// the user.</span></div>
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<div class="ttc" id="ainterpolation__search2_8cpp_html_aa3ec659ec8394d186c761df81ad1f629"><div class="ttname"><a href="../../df/d39/interpolation__search2_8cpp.html#aa3ec659ec8394d186c761df81ad1f629">InterpolationSearch</a></div><div class="ttdeci">int InterpolationSearch(int A[], int n, int x)</div><div class="ttdef"><b>Definition</b> <a href="#l00015">interpolation_search2.cpp:15</a></div></div>
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<div class="ttc" id="ainterpolation__search2_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../df/d39/interpolation__search2_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdef"><b>Definition</b> <a href="#l00032">interpolation_search2.cpp:32</a></div></div>
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