#include <iostream>
#include <CGAL/Simple_cartesian.h>
typedef CGAL::Simple_cartesian<double> Kernel;
typedef Kernel::Point_2 Point_2;

int main()
{
  Point_2 a(1,1), b(9, 9);
  std::cout << "Point a = " << a << std::endl;
  std::cout << "Point b = " << b << std::endl;
  std::cout << "Square distance a-b = " << CGAL::squared_distance(a, b) << std::endl;
  std::cout << "Midpoint of a-b = " << CGAL::midpoint(a, b) << std::endl;
  return 0;
}