title: How to extract digit(s) from the end of string
body: <p>Given strings like the following: </p>
  
  <pre><code>   sdfsd34 
      sdfdsf1
  </code></pre>
  
  <p>I would like to extract: <em>34, 1</em>  using c++ (STL but no boost), c.</p>
  
  <p>thanks</p>