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TheAlgorithms-C/d0/d6d/problem__10_2sol1_8c.html
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&#160;<span id="projectnumber">1.0.0</span>
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<div id="projectbrief">Set of algorithms implemented in C.</div>
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<p><a href="https://projecteuler.net/problem=10">Problem 10</a> solution
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;math.h&gt;</code><br />
<code>#include &lt;stdio.h&gt;</code><br />
<code>#include &lt;stdlib.h&gt;</code><br />
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Include dependency graph for sol1.c:</div>
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Functions</h2></td></tr>
<tr class="memitem:acc871ab6bfead702e983a7f9c412915f"><td class="memItemLeft" align="right" valign="top">char&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d0/d6d/problem__10_2sol1_8c.html#acc871ab6bfead702e983a7f9c412915f">is_prime</a> (unsigned long n)</td></tr>
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<tr class="memitem:ae3d987cb2ad0ddb0c3caa4c2506a20e5"><td class="memItemLeft" align="right" valign="top">unsigned long long&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d0/d6d/problem__10_2sol1_8c.html#ae3d987cb2ad0ddb0c3caa4c2506a20e5">sum_of_primes</a> (unsigned long <a class="el" href="../../db/d01/problem__13_2sol1_8c.html#a0240ac851181b84ac374872dc5434ee4">N</a>)</td></tr>
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<tr class="memitem:a0ddf1224851353fc92bfbff6f499fa97"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d0/d6d/problem__10_2sol1_8c.html#a0ddf1224851353fc92bfbff6f499fa97">main</a> (int argc, char *argv[])</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p><a href="https://projecteuler.net/problem=10">Problem 10</a> solution </p>
<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/kvedala">Krishna Vedala</a> </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="acc871ab6bfead702e983a7f9c412915f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#acc871ab6bfead702e983a7f9c412915f">&#9670;&nbsp;</a></span>is_prime()</h2>
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<td class="memname">char is_prime </td>
<td>(</td>
<td class="paramtype">unsigned long&#160;</td>
<td class="paramname"><em>n</em></td><td>)</td>
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<p>Function to check if a number is prime </p>
<div class="fragment"><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;{</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> i = 2; i &lt; sqrtl(n) + 1; i++)</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160; <span class="keywordflow">if</span> (n % i == 0)</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160; <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160; </div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a0ddf1224851353fc92bfbff6f499fa97">&#9670;&nbsp;</a></span>main()</h2>
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<td class="memname">int main </td>
<td>(</td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>argc</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>argv</em>[]&#160;</td>
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<td></td>
<td>)</td>
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<p>Main function </p>
<div class="fragment"><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;{</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> n = 100;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keywordflow">if</span> (argc == 2) <span class="comment">/* if command line argument is provided */</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; n = atol(argv[1]); <span class="comment">/* use that as the upper limit */</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; printf(<span class="stringliteral">&quot;%ld: %llu\n&quot;</span>, n, <a class="code" href="../../d0/d6d/problem__10_2sol1_8c.html#ae3d987cb2ad0ddb0c3caa4c2506a20e5">sum_of_primes</a>(n));</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ae3d987cb2ad0ddb0c3caa4c2506a20e5">&#9670;&nbsp;</a></span>sum_of_primes()</h2>
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<td class="memname">unsigned long long sum_of_primes </td>
<td>(</td>
<td class="paramtype">unsigned long&#160;</td>
<td class="paramname"><em>N</em></td><td>)</td>
<td></td>
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<p>Computes sum of prime numbers less than N </p>
<div class="fragment"><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;{</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> sum = 2;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">long</span> i = 3; i &lt; <a class="code" href="../../db/d01/problem__13_2sol1_8c.html#a0240ac851181b84ac374872dc5434ee4">N</a>; i += 2) <span class="comment">/* skip even numbers */</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <span class="keywordflow">if</span> (<a class="code" href="../../d0/d6d/problem__10_2sol1_8c.html#acc871ab6bfead702e983a7f9c412915f">is_prime</a>(i))</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; sum += i;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <span class="keywordflow">return</span> sum;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;}</div>
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<div class="ttc" id="aproblem__10_2sol1_8c_html_acc871ab6bfead702e983a7f9c412915f"><div class="ttname"><a href="../../d0/d6d/problem__10_2sol1_8c.html#acc871ab6bfead702e983a7f9c412915f">is_prime</a></div><div class="ttdeci">char is_prime(unsigned long n)</div><div class="ttdef"><b>Definition:</b> sol1.c:11</div></div>
<div class="ttc" id="aproblem__13_2sol1_8c_html_a0240ac851181b84ac374872dc5434ee4"><div class="ttname"><a href="../../db/d01/problem__13_2sol1_8c.html#a0240ac851181b84ac374872dc5434ee4">N</a></div><div class="ttdeci">#define N</div><div class="ttdef"><b>Definition:</b> sol1.c:111</div></div>
<div class="ttc" id="aproblem__10_2sol1_8c_html_ae3d987cb2ad0ddb0c3caa4c2506a20e5"><div class="ttname"><a href="../../d0/d6d/problem__10_2sol1_8c.html#ae3d987cb2ad0ddb0c3caa4c2506a20e5">sum_of_primes</a></div><div class="ttdeci">unsigned long long sum_of_primes(unsigned long N)</div><div class="ttdef"><b>Definition:</b> sol1.c:21</div></div>
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