POLYMORPHISM

 #include<iostream>

using namespace std;

class Car

{

public:

 virtual void start()=0;

};

class Innova:public Car

{

public:

 void start(){cout<<"Innova Started"<<endl;}

};

class Swift:public Car

{

public:

 void start(){cout<<"Swift Started"<<endl;}

};

int main()

{

 //Car c;

 Car *p=new Innova();

 p->start();

 p=new Swift();

 p->start();

}