Sum of two number using pointer Object

Sum_pointer_object.cpp

#include<iostream>
using namespace std;
class A{
	int x,y,z;
	public:
		void add(){
			cout<<"Enter value of x "<<endl;
			cin>>x;
			cout<<"Enter value of y "<<endl;
			cin>>y;
			z = x + y;
			cout<<"Sum = "<<z<<endl;
		}
};
int main(){
	A obj;
	A *ptr;
	
	ptr = &obj;
	
	ptr->add();
	(*ptr).add();
	
	return 0;
}