#include<iostream.h>
	#include<conio.h>
 
	class  base
	{
		private: int x;
			float y;
		public : virtual void getdata( );
			virtual void display( );
	};
	class dev : public base
	{
		private:  int roll;
			 char name[20];
		public : void getdata( );
			void  display( );
	};
	void base :: getdata( )  {  }
	void base :: display( )   {  }
 
	void dev :: getdata( )
	{
		cout<<” Enter Roll of  the Student “;
		cin>> roll;
		cout<<” Enter name of  the student”;
		cin>>name;
        }
	void dev :: display( )
	{
		cout<<”Name is :”<<name<<endl;
		cout<<” Roll no is :”<<roll <<endl;
	}
 
	void main( )
	{
		base * ptr;
		dev obj;
		clrscr( );
		ptr = &obj;
		ptr -> getdata( );
		ptr -> display( );
		getch( );
	}

OUTPUT

Enter the roll no of the student: 111
Enter the name of the student : Vijay

Name is : Vijay
 Roll no is : 111

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