Class contains pure virtual function, then it is termed Abstract Class

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• Brijesh   -Posted on 06 Oct 15
  If a class contains pure virtual function, then it is termed as abstract class.
  Abstract classes are used to provide an Interface for its sub classes and it must have pure virtual function.
  Example:
  class BaseClass //Abstract base class
  {
  public:
  virtual void show() = 0; //Pure Virtual Function
  };
  
  class Derived:public BaseClass
  {
  public:
  void show()
  {
  cout << "Implementation of Pure Virtual Function in Derived class\n";
  }
  };
  
  int main()
  {
  
  BaseClass *b;
  Derived obj;
  b = &obj;
  b->show();
  }
  

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