//  STYC++ in 21 days chapter 17 p 1
//
//  Using namespaces
//
//

#include <iostream>

namespace Window
{

   const int MAX_X = 30;
   const int MAX_Y = 40;

   class Pane
    {
	   public:
	   
	      Pane();
		  ~Pane();
		  void size(int x, int y);
          void move(int x, int y); 
		  void show();

       private:

	      static int cnt;
		  int x;
		  int y;
     }; //end of class pane def

} // eon <-- end of namespace

int Window::Pane::cnt = 0;
Window::Pane::Pane() : x(0), y(0) {} // constructor
Window::Pane::~Pane() {} // destructor

void Window::Pane::size( int x, int y )
{
   if ( x < Window::MAX_X && x > 0 ) Pane::x = x;
   if ( y < Window::MAX_Y && y > 0 ) Pane::y = y;
} 

void Window::Pane::move(int x,int y)
{
  if ( x < Window::MAX_X && x > 0 ) Pane::x = x;
  if ( y < Window::MAX_Y && y > 0 ) Pane::y = y;
}  

void Window::Pane::show()
{
	std::cout << " x : " << Pane::x;
	std::cout << " and y : " << Pane::y << std::endl;
}

// driver

int main()
{

	Window::Pane pane;

	pane.move(20,20);
	pane.show();

	return 0;

} // eos