Runtime polymorphism - Defiition - Polymorphism and Abstract Classes

Discussion

• Nihal   -Posted on 12 Oct 15
  Runtime polymorphism is achieved only when a virtual function is accessed through a pointer to the base class. You can call derived class function through base class pointer type. It is also called as late binding. The keyword virtual on a member function in base class indicates to the compiler that binding will be done at run time.
  Example:
  class BaseClass
  {
  public:
  virtual void show()
  {
  cout<<" virtual function in base class \n";
  }
  };
  
  class DerivedClass: public BaseClass
  {
  public:
  void show()
  {
  cout<<"Function overriding in Derived \n";
  }
  };
  
  int main(void)
  {
  BaseClass *bp = new DerivedClass;
  bp->show(); // RUN-TIME POLYMORPHISM
  return 0;
  }
  

➨ Post your comment / Share knowledge