/** @file list3207.cpp */
/** Listing 32-7. Calling const and Non-const Member Functions */
#include <cmath>
#include <iostream>
#include <ostream>

// Use the same point definition as Listing 32-6
#include "list3207.code"

void print_polar(point const& pt)
{
  std::cout << "{ r=" << pt.distance() << ", angle=" << pt.angle() << " }\n";
}

void print_cartesian(point const& pt)
{
  std::cout << "{ x=" << pt.x << ", y=" << pt.y << " }\n";
}

int main()
{
  point p1, p2;
  double const pi = 3.141592653589792;
  p1.x = std::cos(pi / 3);
  p1.y = std::sin(pi / 3);
  print_polar(p1);
  print_cartesian(p1);
  p2 = p1;
  p2.scale(4.0);
  print_polar(p2);
  print_cartesian(p2);
  p2.offset(0.0, -2.0);
  print_polar(p2);
  print_cartesian(p2);
}