Is there anything like Virtual Class present ?

Hi,
Is there any concept called 'Virtual Class' present in C++ ?

Thanks
Kiran

Not by that name. What does it mean?

Yes, by with different name.

What is it ?

Is it mean by inheriting a base class as Virtual one ?

If Virtual class is something like an abstract base class then there´s an equivalent in C++. Unlike as in java you don´t have to mark the abstract base class, all you have to do is to declare a pure virtual function and the class is automatically abstract.

Code:

---

/*no keyword needed here*/ class AbstractBaseClass
{
public:
  AbstractBaseClass();
  virtual ~AbstractBaseClass();

  // pure virtual function declaration makes this class virtual/abstract
  virtual func() = 0;
};

class ConcreteClass : public AbstractBaseClass
{
public:
  ConcreateClass();

  // implementation of inherited pure virtual function
  void func();
};

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Quote:

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Originally Posted by rsodimbakam

What is it ?

Is it mean by inheriting a base class as Virtual one ?

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I guess you could call a class virtual if it contains virtual functions. If all functions are pure virtual you could call the class abstract or an interface.

Then there's something called virtual inheritance. It's a way do avoid problems with multiple copies of the same class in a multiple inheritance situation. A class can be declared to be virtually inherited by the inheriting class.