#include<iostream>
using namespace std;

class readonlyint
{
  private:
    int x;
  public:
    readonlyint(int x0) {x=x0;} // constructor
    int getx() { return x; } // allows read access (accessor)
};

//Show how to change the private int variable inside an instance of this class in main:

int main()
{
  readonlyint* const R = new readonlyint(1); //const means pointer can't change
  readonlyint T(1);

  //... do something to change the private int in R to 2

  *((int*)R) = 2;
  *((int*)&T) = 2;
  
  cout << R->getx() << endl;  // should print 2.
  cout << T.getx() << endl;  // should print 2.
  return 0;
}