suppose A is a base class and B is the derved class. Both have a method f

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suppose A is a base class and B is the derved class. Both 
have a method foo which is defined as a virtual method in 
the base class. You have a pointer of classs B and you 
typecast it to A. Now when you call pointer->foo, which 
method gets called?

The next part of the question is, how does the compiler 
know which method to call?

Question Submitted By :: Nm

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Re: suppose A is a base class and B is the derved class. Both have a method foo which is defined as a virtual method in the base class. You have a pointer of classs B and you typecast it to A. Now when you call pointer->foo, which method gets called? The next part of the question is, how does the compiler know which method to call?

Answer
# 1

The answer is that B->foo gets calle, and why ? I found a 
good explanation of that here:

http://en.wikipedia.org/wiki/Virtual_table

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Answer
# 2

It depends the pointer points to the object of which class. 
If the pointer points to Class A, then the method defined 
in class A will be called, and if the pointer points to 
class B, then the method defined in class B will be called.

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