title: What is a vtable in C++
body: <blockquote>
  <p><strong>Possible Duplicate:</strong><br />
  <a href="https://stackoverflow.com/questions/3004501/why-do-i-need-virtual-table">why do I need virtual table?</a></p>
  </blockquote>
  
  <p>What is a vtable in C++?</p>
  <p>So far I know that vtable is a virtual table which has an array of pointers to virtual functions.  Is there an article I can read with an example of a practical implementation?  (Any walk through will be appreciated.)</p>