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<div id="projectbrief">Set of algorithms implemented in C.</div>
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<a href="#define-members">Macros</a> &#124;
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<div class="headertitle"><div class="title">jump_search.c File Reference</div></div>
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<p>Implementation of <a href="https://en.wikipedia.org/wiki/Jump_search" target="_blank">jump search</a> algorithm.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;assert.h&gt;</code><br />
<code>#include &lt;math.h&gt;</code><br />
<code>#include &lt;stdio.h&gt;</code><br />
</div><div class="textblock"><div class="dynheader">
Include dependency graph for jump_search.c:</div>
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Macros</h2></td></tr>
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#define&#160;</td><td class="memItemRight" valign="bottom"><b>min</b>(X, Y)&#160;&#160;&#160;((X) &lt; (Y) ? (X) : (Y))</td></tr>
<tr class="memdesc:a8195a86b6d75b9a3939505e8bb50021e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Macro to return the minimum of two values. <br /></td></tr>
<tr class="separator:a8195a86b6d75b9a3939505e8bb50021e"><td class="memSeparator" colspan="2">&#160;</td></tr>
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Functions</h2></td></tr>
<tr class="memitem:aff36d719e6fca6aea4377a089580c603"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d6/d7b/jump__search_8c.html#aff36d719e6fca6aea4377a089580c603">jump_search</a> (const int *arr, int x, size_t n)</td></tr>
<tr class="memdesc:aff36d719e6fca6aea4377a089580c603"><td class="mdescLeft">&#160;</td><td class="mdescRight">Implement Jump-search algorithm. <a href="../../d6/d7b/jump__search_8c.html#aff36d719e6fca6aea4377a089580c603">More...</a><br /></td></tr>
<tr class="separator:aff36d719e6fca6aea4377a089580c603"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae1a3968e7947464bee7714f6d43b7002"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d6/d7b/jump__search_8c.html#ae1a3968e7947464bee7714f6d43b7002">test</a> ()</td></tr>
<tr class="memdesc:ae1a3968e7947464bee7714f6d43b7002"><td class="mdescLeft">&#160;</td><td class="mdescRight">Test implementation of the function. <a href="../../d6/d7b/jump__search_8c.html#ae1a3968e7947464bee7714f6d43b7002">More...</a><br /></td></tr>
<tr class="separator:ae1a3968e7947464bee7714f6d43b7002"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d6/d7b/jump__search_8c.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
<tr class="memdesc:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Main function. <a href="../../d6/d7b/jump__search_8c.html#ae66f6b31b5ad750f1fe042a706a4e3d4">More...</a><br /></td></tr>
<tr class="separator:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p >Implementation of <a href="https://en.wikipedia.org/wiki/Jump_search" target="_blank">jump search</a> algorithm. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="aff36d719e6fca6aea4377a089580c603" name="aff36d719e6fca6aea4377a089580c603"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aff36d719e6fca6aea4377a089580c603">&#9670;&nbsp;</a></span>jump_search()</h2>
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<td class="memname">int jump_search </td>
<td>(</td>
<td class="paramtype">const int *&#160;</td>
<td class="paramname"><em>arr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>x</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Implement Jump-search algorithm. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in]</td><td class="paramname">arr</td><td>Array to search within </td></tr>
<tr><td class="paramdir"></td><td class="paramname">x</td><td>value to search for </td></tr>
<tr><td class="paramdir"></td><td class="paramname">n</td><td>length of array </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>index where the value was found </dd>
<dd>
-1 if value not found </dd></dl>
<div class="fragment"><div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span>{</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordtype">int</span> step = floor(sqrt(n));</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keywordtype">int</span> prev = 0;</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="keywordflow">while</span> (arr[<a class="code hl_define" href="../../d6/d7b/jump__search_8c.html#a8195a86b6d75b9a3939505e8bb50021e">min</a>(step, n) - 1] &lt; x)</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> prev = step;</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> step += floor(sqrt(n));</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordflow">if</span> (prev &gt;= n)</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> {</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keywordflow">return</span> -1;</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> }</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> }</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="keywordflow">while</span> (arr[prev] &lt; x)</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> prev = prev + 1;</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">if</span> (prev == <a class="code hl_define" href="../../d6/d7b/jump__search_8c.html#a8195a86b6d75b9a3939505e8bb50021e">min</a>(step, n))</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> {</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keywordflow">return</span> -1;</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> }</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">if</span> (arr[prev] == x)</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> {</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">return</span> prev;</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">return</span> -1;</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span>}</div>
<div class="ttc" id="ajump__search_8c_html_a8195a86b6d75b9a3939505e8bb50021e"><div class="ttname"><a href="../../d6/d7b/jump__search_8c.html#a8195a86b6d75b9a3939505e8bb50021e">min</a></div><div class="ttdeci">#define min(X, Y)</div><div class="ttdoc">Macro to return the minimum of two values.</div><div class="ttdef"><b>Definition:</b> jump_search.c:13</div></div>
</div><!-- fragment -->
</div>
</div>
<a id="ae66f6b31b5ad750f1fe042a706a4e3d4" name="ae66f6b31b5ad750f1fe042a706a4e3d4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&nbsp;</a></span>main()</h2>
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<td class="memname">int main </td>
<td>(</td>
<td class="paramtype">void&#160;</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Main function. </p>
<div class="fragment"><div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span>{</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <a class="code hl_function" href="../../d6/d7b/jump__search_8c.html#ae1a3968e7947464bee7714f6d43b7002">test</a>();</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span>}</div>
<div class="ttc" id="ajump__search_8c_html_ae1a3968e7947464bee7714f6d43b7002"><div class="ttname"><a href="../../d6/d7b/jump__search_8c.html#ae1a3968e7947464bee7714f6d43b7002">test</a></div><div class="ttdeci">void test()</div><div class="ttdoc">Test implementation of the function.</div><div class="ttdef"><b>Definition:</b> jump_search.c:58</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#ae1a3968e7947464bee7714f6d43b7002">&#9670;&nbsp;</a></span>test()</h2>
<div class="memitem">
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<tr>
<td class="memname">void test </td>
<td>(</td>
<td class="paramtype">void&#160;</td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Test implementation of the function. </p>
<div class="fragment"><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> <span class="keywordtype">int</span> arr[] = {0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610};</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordtype">size_t</span> n = <span class="keyword">sizeof</span>(arr) / <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>);</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordtype">int</span> x = 55;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> printf(<span class="stringliteral">&quot;Test 1.... &quot;</span>);</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordtype">int</span> index = <a class="code hl_function" href="../../d6/d7b/jump__search_8c.html#aff36d719e6fca6aea4377a089580c603">jump_search</a>(arr, x, n);</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> assert(index == 10);</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> printf(<span class="stringliteral">&quot;passed\nTest 2.... &quot;</span>);</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> x = 56;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> index = <a class="code hl_function" href="../../d6/d7b/jump__search_8c.html#aff36d719e6fca6aea4377a089580c603">jump_search</a>(arr, x, n);</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> assert(index == -1);</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> printf(<span class="stringliteral">&quot;passed\nTest 3.... &quot;</span>);</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> x = 13;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> index = <a class="code hl_function" href="../../d6/d7b/jump__search_8c.html#aff36d719e6fca6aea4377a089580c603">jump_search</a>(arr, x, n);</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> assert(index == 7);</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> printf(<span class="stringliteral">&quot;passed\n&quot;</span>);</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span>}</div>
<div class="ttc" id="ajump__search_8c_html_aff36d719e6fca6aea4377a089580c603"><div class="ttname"><a href="../../d6/d7b/jump__search_8c.html#aff36d719e6fca6aea4377a089580c603">jump_search</a></div><div class="ttdeci">int jump_search(const int *arr, int x, size_t n)</div><div class="ttdoc">Implement Jump-search algorithm.</div><div class="ttdef"><b>Definition:</b> jump_search.c:24</div></div>
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