title: Why use virtual functions?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2391679/can-someone-explain-c-virtual-methods">Can someone explain C++ Virtual Methods?</a>  </p>
  </blockquote>
  
  
  
  <p>I have a question regarding to the C++ virtual functions.  </p>
  
  <p>Why and when do we use virtual functions? Can anyone give me a real time implementation or use of virtual functions?</p>