ALGORITHM

1. Start the process
2. Invoke the class with pointer
3. Assign ptr[0] <- &objb; i. Assign ptr[1] <- &objc; 4. Ptr(0)points the getdata() a. Get the values of x and y 5. Ptr(1) points to the getdata() a. Get the roll no and name of the student 6. Ptr(0) and ptr(1) are points to the display() a. Print the values 7. Stop the process PROGRAM

#include
#include
			
	class base
	{
		private: int x;
			float y;
		public:  
			virtual void getdata( );
			virtual void display( );
	};
	class devb: public base
	{
		private: int roll;
			char name[20];
		public:  virtual void getdata( );
			virtual void display( );
	};
	class devc : public  base
	{
		private: float height;
			float weight;
		public : virtual void getdata( );
			 virtual void display( );
	}:
	void base :: getdata( )
	{
		cout<<” Enter any Integer”;
		cin>>x;
		cout<<”Enter a real no”;
		cin>>y;
	}
	void base ::display( )
	{
		cout<<”The no X=”<>roll;
		cout<<”Enter Name of Student :”;
		cin>>name;
	}
	void devc :: getdata( )
	{
		cout<<”Enter height and weight”;
		cin>>height>>weight;
	}
	void devc :: display( )
	{
		cout<<”Height :”<getdata( );
		ptr[1] -> getdata( );
		ptr[1] -> display( );
		ptr[1] -> display( );
		getch ( );
  	}

OUTPUT

Enter the Roll of the Student: 101
Enter Name of Student : salah
height and weight 170 72

Roll of the Student is:101
Name of the Student is:salah
Height :170
Weight :72

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