overriding in c++

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When sub class as the same name function as super class then sub class function override the base class function and property is known as function overriding.

Function overriding is the way to achieve runtime polymorphism.

Function Overriding example

#include<iostream>
using namespace std; 
class A
{
   public:
   void display()
   {
    cout<<"Base class display function"<<endl;
   }
};


class B : public A
 {
  public:
  void display()
  {
   cout<<"Derived Class display function";
  }
};

int main()
{
 A a1;
 a1.display();
 B b1;
 b1.display(); // Here B class function overrides the its super class function
 return 0;
}

Output of the above program is as follows.

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overriding in c++

Function Overriding example

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