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<p>A C++ Program to find the Sum of Digits of input integer.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;cassert&gt;</code><br />
<code>#include &lt;iostream&gt;</code><br />
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Include dependency graph for sum_of_digits.cpp:</div>
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Functions</h2></td></tr>
<tr class="memitem:a4619c78b6ad985713024f930f31c4395"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/d83/sum__of__digits_8cpp.html#a4619c78b6ad985713024f930f31c4395">sum_of_digits</a> (int num)</td></tr>
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<tr class="memitem:a1440a7779ac56f47a3f355ce4a8c7da0"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d4/d83/sum__of__digits_8cpp.html#a1440a7779ac56f47a3f355ce4a8c7da0">test1</a> ()</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p >A C++ Program to find the Sum of Digits of input integer. </p>
<p >Copyright 2020 </p><dl class="section author"><dt>Author</dt><dd>iamnambiar </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&nbsp;</a></span>main()</h2>
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<p >Main Function </p>
<div class="fragment"><div class="line"><span class="lineno"> 68</span> {</div>
<div class="line"><span class="lineno"> 69</span> <a class="code hl_function" href="../../d4/d83/sum__of__digits_8cpp.html#ae1a3968e7947464bee7714f6d43b7002">test</a>();</div>
<div class="line"><span class="lineno"> 70</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Success.&quot;</span> &lt;&lt; <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><span class="lineno"> 71</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 72</span>}</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="asum__of__digits_8cpp_html_ae1a3968e7947464bee7714f6d43b7002"><div class="ttname"><a href="../../d4/d83/sum__of__digits_8cpp.html#ae1a3968e7947464bee7714f6d43b7002">test</a></div><div class="ttdeci">void test()</div><div class="ttdef"><b>Definition:</b> sum_of_digits.cpp:58</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a4619c78b6ad985713024f930f31c4395">&#9670;&nbsp;</a></span>sum_of_digits()</h2>
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<p >Function to find the sum of the digits of an integer. </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">num</td><td>The integer. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Sum of the digits of the integer.</dd></dl>
<p>\detail First the algorithm check whether the num is negative or positive, if it is negative, then we neglect the negative sign. Next, the algorithm extract the last digit of num by dividing by 10 and extracting the remainder and this is added to the sum. The number is then divided by 10 to remove the last digit. This loop continues until num becomes 0. </p>
<div class="fragment"><div class="line"><span class="lineno"> 23</span> {</div>
<div class="line"><span class="lineno"> 24</span> <span class="comment">// If num is negative then negative sign is neglected.</span></div>
<div class="line"><span class="lineno"> 25</span> <span class="keywordflow">if</span> (num &lt; 0) {</div>
<div class="line"><span class="lineno"> 26</span> num = -1 * num;</div>
<div class="line"><span class="lineno"> 27</span> }</div>
<div class="line"><span class="lineno"> 28</span> <span class="keywordtype">int</span> <a class="code hl_function" href="../../d8/d77/namespacemachine__learning.html#a6f1c98c016ad34ff3d9f39372161bd35">sum</a> = 0;</div>
<div class="line"><span class="lineno"> 29</span> <span class="keywordflow">while</span> (num &gt; 0) {</div>
<div class="line"><span class="lineno"> 30</span> <a class="code hl_function" href="../../d8/d77/namespacemachine__learning.html#a6f1c98c016ad34ff3d9f39372161bd35">sum</a> = <a class="code hl_function" href="../../d8/d77/namespacemachine__learning.html#a6f1c98c016ad34ff3d9f39372161bd35">sum</a> + (num % 10);</div>
<div class="line"><span class="lineno"> 31</span> num = num / 10;</div>
<div class="line"><span class="lineno"> 32</span> }</div>
<div class="line"><span class="lineno"> 33</span> <span class="keywordflow">return</span> <a class="code hl_function" href="../../d8/d77/namespacemachine__learning.html#a6f1c98c016ad34ff3d9f39372161bd35">sum</a>;</div>
<div class="line"><span class="lineno"> 34</span>}</div>
<div class="ttc" id="anamespacemachine__learning_html_a6f1c98c016ad34ff3d9f39372161bd35"><div class="ttname"><a href="../../d8/d77/namespacemachine__learning.html#a6f1c98c016ad34ff3d9f39372161bd35">machine_learning::sum</a></div><div class="ttdeci">T sum(const std::vector&lt; std::valarray&lt; T &gt; &gt; &amp;A)</div><div class="ttdef"><b>Definition:</b> vector_ops.hpp:232</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#ae1a3968e7947464bee7714f6d43b7002">&#9670;&nbsp;</a></span>test()</h2>
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<p >Function for testing the <a class="el" href="../../d4/d83/sum__of__digits_8cpp.html#a4619c78b6ad985713024f930f31c4395">sum_of_digits()</a> with all the test cases. </p>
<div class="fragment"><div class="line"><span class="lineno"> 58</span> {</div>
<div class="line"><span class="lineno"> 59</span> <span class="comment">// First test.</span></div>
<div class="line"><span class="lineno"> 60</span> <a class="code hl_function" href="../../d4/d83/sum__of__digits_8cpp.html#a1440a7779ac56f47a3f355ce4a8c7da0">test1</a>();</div>
<div class="line"><span class="lineno"> 61</span> <span class="comment">// Second test.</span></div>
<div class="line"><span class="lineno"> 62</span> <a class="code hl_function" href="../../d4/d83/sum__of__digits_8cpp.html#a0283886819c7c140a023582b7269e2d0">test2</a>();</div>
<div class="line"><span class="lineno"> 63</span>}</div>
<div class="ttc" id="asum__of__digits_8cpp_html_a0283886819c7c140a023582b7269e2d0"><div class="ttname"><a href="../../d4/d83/sum__of__digits_8cpp.html#a0283886819c7c140a023582b7269e2d0">test2</a></div><div class="ttdeci">void test2()</div><div class="ttdef"><b>Definition:</b> sum_of_digits.cpp:49</div></div>
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<p >Function for testing the <a class="el" href="../../d4/d83/sum__of__digits_8cpp.html#a4619c78b6ad985713024f930f31c4395">sum_of_digits()</a> function with a first test case of 119765 and assert statement. </p>
<div class="fragment"><div class="line"><span class="lineno"> 40</span> {</div>
<div class="line"><span class="lineno"> 41</span> <span class="keywordtype">int</span> test_case_1 = <a class="code hl_function" href="../../d4/d83/sum__of__digits_8cpp.html#a4619c78b6ad985713024f930f31c4395">sum_of_digits</a>(119765);</div>
<div class="line"><span class="lineno"> 42</span> assert(test_case_1 == 29);</div>
<div class="line"><span class="lineno"> 43</span>}</div>
<div class="ttc" id="asum__of__digits_8cpp_html_a4619c78b6ad985713024f930f31c4395"><div class="ttname"><a href="../../d4/d83/sum__of__digits_8cpp.html#a4619c78b6ad985713024f930f31c4395">sum_of_digits</a></div><div class="ttdeci">int sum_of_digits(int num)</div><div class="ttdef"><b>Definition:</b> sum_of_digits.cpp:23</div></div>
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<p >Function for testing the <a class="el" href="../../d4/d83/sum__of__digits_8cpp.html#a4619c78b6ad985713024f930f31c4395">sum_of_digits()</a> function with a second test case of -12256 and assert statement. </p>
<div class="fragment"><div class="line"><span class="lineno"> 49</span> {</div>
<div class="line"><span class="lineno"> 50</span> <span class="keywordtype">int</span> test_case_2 = <a class="code hl_function" href="../../d4/d83/sum__of__digits_8cpp.html#a4619c78b6ad985713024f930f31c4395">sum_of_digits</a>(-12256);</div>
<div class="line"><span class="lineno"> 51</span> assert(test_case_2 == 16);</div>
<div class="line"><span class="lineno"> 52</span>}</div>
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