#include <iostream>

class Thing {
public:
  Thing();// default constructor
  Thing(int x);// constructor with parameter
  void Print();
private:
  const int data;
};

Thing::Thing() : data(10) {
}

Thing::Thing(int x) : data(x) {
}

void Thing:: Print() {
  std::cout<<data<<std::endl;
}


int main() {
  Thing T1, T2(5);

  T1.Print();
  T2.Print();

  return 0;
}