title: what library do I have to use for 'ctz' command in c++?
body: <p>Is there a library for 'count trailing zeroes'(ctz command)?<br/> What is the procedure for do that?<br/></p>
  
  <p>I tried:<br/></p>
  
  <pre><code>#include&lt;iostream&gt;
  using namespace std;
  int main()
  {
      int value = 12;
      cout&lt;&lt;ctz(value);
  }
  </code></pre>