What is the difference between a virtual function and a pure virtual function?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1306778/c-virtual-pure-virtual-explained">C++ Virtual/Pure Virtual Explained</a>  </p>
</blockquote>



<p>What is the difference between a virtual function and a pure virtual function?</p>
