C++オブジェクトポインタ

#include<iostream>
using namespace std;

class MyClass //   MyClass
{
private:
	int x, y;
public:
	MyClass(){x=0; y=0;} //    1
	MyClass(int a, int b){x=a; y=b;} //      2
	void display(){cout<<"x= "<<x<<", y= "<<y<<endl;}
};

int main()
{
	MyClass s(2, 2), *p;
	p = &s;
	s.display();
	p->display();
	return 0;
}