Possible Duplicate:
What is the difference between an abstract and virtual function?
What are the advantages of using abstract over virtual methods and vice versa?
Abstract Methods:
- Only the abstract class can hold abstract methods.
- Also the derived class need to implement the method and no implmentation is provided in the class.
Virtual Methods:
- A class can declare these and also provide the implementaion of the same.
- Also the derived class need to implement of the method to override it.
