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<p>A simple program to check if the given number is a factorial of some number or not.
<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 check_factorial.cpp:</div>
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Functions</h2></td></tr>
<tr class="memitem:a814eea122b9c241c2b7c1ab760a3eca2"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d8/dd5/check__factorial_8cpp.html#a814eea122b9c241c2b7c1ab760a3eca2">is_factorial</a> (uint64_t n)</td></tr>
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<tr class="memitem:a88ec9ad42717780d6caaff9d3d6977f9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d8/dd5/check__factorial_8cpp.html#a88ec9ad42717780d6caaff9d3d6977f9">tests</a> ()</td></tr>
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<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../d8/dd5/check__factorial_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A simple program to check if the given number is a factorial of some number or not. </p>
<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/divyajyotiuk" target="_blank">Divyajyoti Ukirde</a> </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a814eea122b9c241c2b7c1ab760a3eca2" name="a814eea122b9c241c2b7c1ab760a3eca2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a814eea122b9c241c2b7c1ab760a3eca2">&#9670;&#160;</a></span>is_factorial()</h2>
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<td class="memname">bool is_factorial </td>
<td>(</td>
<td class="paramtype">uint64_t&#160;</td>
<td class="paramname"><em>n</em></td><td>)</td>
<td></td>
</tr>
</table>
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<p>Function to check if the given number is factorial of some number or not. </p><dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">n</td><td>number to be checked. </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>if number is a factorial, returns true, else false. </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 16</span> {</div>
<div class="line"><span class="lineno"> 17</span> <span class="keywordflow">if</span> (n &lt;= 0) {</div>
<div class="line"><span class="lineno"> 18</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><span class="lineno"> 19</span> }</div>
<div class="line"><span class="lineno"> 20</span> <span class="keywordflow">for</span> (uint32_t i = 1;; i++) {</div>
<div class="line"><span class="lineno"> 21</span> <span class="keywordflow">if</span> (n % i != 0) {</div>
<div class="line"><span class="lineno"> 22</span> <span class="keywordflow">break</span>;</div>
<div class="line"><span class="lineno"> 23</span> }</div>
<div class="line"><span class="lineno"> 24</span> n = n / i;</div>
<div class="line"><span class="lineno"> 25</span> }</div>
<div class="line"><span class="lineno"> 26</span> <span class="keywordflow">if</span> (n == 1) {</div>
<div class="line"><span class="lineno"> 27</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><span class="lineno"> 28</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><span class="lineno"> 29</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><span class="lineno"> 30</span> }</div>
<div class="line"><span class="lineno"> 31</span>}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&#160;</a></span>main()</h2>
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<td class="memname">int main </td>
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<td class="paramtype">void&#160;</td>
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<p>Main function </p><dl class="section return"><dt>Returns</dt><dd>0 on exit </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 61</span> {</div>
<div class="line"><span class="lineno"> 62</span> <a class="code hl_function" href="../../d8/dd5/check__factorial_8cpp.html#a88ec9ad42717780d6caaff9d3d6977f9">tests</a>();</div>
<div class="line"><span class="lineno"> 63</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 64</span>}</div>
<div class="ttc" id="acheck__factorial_8cpp_html_a88ec9ad42717780d6caaff9d3d6977f9"><div class="ttname"><a href="../../d8/dd5/check__factorial_8cpp.html#a88ec9ad42717780d6caaff9d3d6977f9">tests</a></div><div class="ttdeci">void tests()</div><div class="ttdef"><b>Definition:</b> check_factorial.cpp:36</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a88ec9ad42717780d6caaff9d3d6977f9">&#9670;&#160;</a></span>tests()</h2>
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<td class="memname">void tests </td>
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<p>Test function </p><dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 36</span> {</div>
<div class="line"><span class="lineno"> 37</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;Test 1:\t n=50\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 38</span> assert(<a class="code hl_function" href="../../d8/dd5/check__factorial_8cpp.html#a814eea122b9c241c2b7c1ab760a3eca2">is_factorial</a>(50) == <span class="keyword">false</span>);</div>
<div class="line"><span class="lineno"> 39</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;passed\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 40</span> </div>
<div class="line"><span class="lineno"> 41</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;Test 2:\t n=720\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 42</span> assert(<a class="code hl_function" href="../../d8/dd5/check__factorial_8cpp.html#a814eea122b9c241c2b7c1ab760a3eca2">is_factorial</a>(720) == <span class="keyword">true</span>);</div>
<div class="line"><span class="lineno"> 43</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;passed\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 44</span> </div>
<div class="line"><span class="lineno"> 45</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;Test 3:\t n=0\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 46</span> assert(<a class="code hl_function" href="../../d8/dd5/check__factorial_8cpp.html#a814eea122b9c241c2b7c1ab760a3eca2">is_factorial</a>(0) == <span class="keyword">false</span>);</div>
<div class="line"><span class="lineno"> 47</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;passed\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 48</span> </div>
<div class="line"><span class="lineno"> 49</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;Test 4:\t n=479001600\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 50</span> assert(<a class="code hl_function" href="../../d8/dd5/check__factorial_8cpp.html#a814eea122b9c241c2b7c1ab760a3eca2">is_factorial</a>(479001600) == <span class="keyword">true</span>);</div>
<div class="line"><span class="lineno"> 51</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;passed\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 52</span> </div>
<div class="line"><span class="lineno"> 53</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;Test 5:\t n=-24\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 54</span> assert(<a class="code hl_function" href="../../d8/dd5/check__factorial_8cpp.html#a814eea122b9c241c2b7c1ab760a3eca2">is_factorial</a>(-24) == <span class="keyword">false</span>);</div>
<div class="line"><span class="lineno"> 55</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;passed\n&quot;</span>;</div>
<div class="line"><span class="lineno"> 56</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>
<div class="ttc" id="acheck__factorial_8cpp_html_a814eea122b9c241c2b7c1ab760a3eca2"><div class="ttname"><a href="../../d8/dd5/check__factorial_8cpp.html#a814eea122b9c241c2b7c1ab760a3eca2">is_factorial</a></div><div class="ttdeci">bool is_factorial(uint64_t n)</div><div class="ttdef"><b>Definition:</b> check_factorial.cpp:16</div></div>
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