Answer Posted / achal ubbott

The concept of virtual inheritance was evolved to avoid
ambiguity/duplication.

e.g.
class base
{
int value;
};
now we do some multiple inheritance
class A:public base {};
class B:public base {};

Now value is member to both the classes A and B.
Lets have a class C that inherits from both A and B.
class C:public A, public B {};

Now should that mean that C have 2 copies of value as its
data member? Yes and this leads to ambiguity.
So do like this

class C:virtual public A,virtual public B {};

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