class having data members pointer to integer

#include <iostream>

using namespace std;

 class Pair 

 {

    public:

    int *pa,*pb;

    Pair(int, int);

    Pair(const Pair &);

    ~Pair();

};

 Pair::Pair(int x,int y)

 {

   std::cout<<"para const";

    pa=new int(x);

    pb=new int(y);

 }

 Pair::Pair(const Pair &p)

 {

   std::cout<<"copy const";

  pa=new int(*(p.pa));

  pb=new int(*(p.pb));

 }

 Pair::~Pair()

 {

   std::cout<<"destructor";

 }

int main()

{

  

   Pair p(15,16);

   Pair q(p);  

   Pair *hp = new Pair(23,42);

  delete hp;

  hp=nullptr;

  cout << "If this message is printed,"

    << " at least the program hasn't crashed yet!\n"

    << "But you may want to print other diagnostic messages too." << std::endl;

    return 0;

}