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<div id="projectbrief">Set of algorithms implemented in C.</div>
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<div class="headertitle"><div class="title">sol1.c File Reference</div></div>
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<p><a href="https://projecteuler.net/problem=10" target="_blank">Problem 10</a> solution
Documentation for d5d68d5842827cbbc1d35d7ec67247b97acb8dde
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<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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Functions</h2></td></tr>
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<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>
<tr class="memdesc:acc871ab6bfead702e983a7f9c412915f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function to check if a number is prime. <a href="../../d0/d6d/problem__10_2sol1_8c.html#acc871ab6bfead702e983a7f9c412915f">More...</a><br /></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 N)</td></tr>
<tr class="memdesc:ae3d987cb2ad0ddb0c3caa4c2506a20e5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Computes sum of prime numbers less than N. <a href="../../d0/d6d/problem__10_2sol1_8c.html#ae3d987cb2ad0ddb0c3caa4c2506a20e5">More...</a><br /></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>
<tr class="memdesc:a0ddf1224851353fc92bfbff6f499fa97"><td class="mdescLeft">&#160;</td><td class="mdescRight">Main function. <a href="../../d0/d6d/problem__10_2sol1_8c.html#a0ddf1224851353fc92bfbff6f499fa97">More...</a><br /></td></tr>
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Documentation for 779e2f073e30694c6448e8f988e54e3ae007caf4
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<div class="textblock"><p ><a href="https://projecteuler.net/problem=10" target="_blank">Problem 10</a> solution </p>
<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/kvedala" target="_blank">Krishna Vedala</a> </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="acc871ab6bfead702e983a7f9c412915f" name="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 id="l00012" name="l00012"></a><span class="lineno"> 12</span>{</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> <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 id="l00014" name="l00014"></a><span class="lineno"> 14</span> <span class="keywordflow">if</span> (n % i == 0)</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> <span class="keywordflow">return</span> 1;</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span>}</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>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>argv</em>[]&#160;</td>
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<p>Main function. </p>
<div class="fragment"><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="keywordtype">unsigned</span> <span class="keywordtype">long</span> n = 100;</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> <span class="keywordflow">if</span> (argc == 2) <span class="comment">/* if command line argument is provided */</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> n = atol(argv[1]); <span class="comment">/* use that as the upper limit */</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> printf(<span class="stringliteral">&quot;%ld: %llu\n&quot;</span>, n, <a class="code hl_function" href="../../d0/d6d/problem__10_2sol1_8c.html#ae3d987cb2ad0ddb0c3caa4c2506a20e5">sum_of_primes</a>(n));</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span>}</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="ttdoc">Computes sum of prime numbers less than N.</div><div class="ttdef"><b>Definition:</b> sol1.c:21</div></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>
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<td class="paramname"><em>N</em></td><td>)</td>
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<p>Computes sum of prime numbers less than N. </p>
<div class="fragment"><div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span>{</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> sum = 2;</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">for</span> (<span class="keywordtype">long</span> i = 3; i &lt; N; i += 2) <span class="comment">/* skip even numbers */</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="../../d0/d6d/problem__10_2sol1_8c.html#acc871ab6bfead702e983a7f9c412915f">is_prime</a>(i))</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> sum += i;</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">return</span> sum;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span>}</div>
<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="ttdoc">Function to check if a number is prime.</div><div class="ttdef"><b>Definition:</b> sol1.c:11</div></div>
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