//	File: point.cpp
//
//	Define a Point class that illustrates a point at coordinates
//

#include <iostream>
#include <iomanip>

using namespace std;

class Point
{
	//	data
	int x,
	    y;
public:
	Point ()	// origin
	{
		x = 0; y = 0;
	}
	Point (int a, int b)
	{
		x = a;
		y = b;
	}
	float Distance (Point p)	// observer
	{
		float d;	//local variable
		int x0, y0;		
		x0 = x - p.x;
		y0 = y - p.y;
		d = sqrt( (1.0*x0 * x0) + (y0 * y0));
		return d;
	}
};

enum StatusType { ON, OFF};

// define a subclass  of Point, named Pixel
class Pixel : public Point
{
	StatusType status;
public:
	Pixel ()
	{
		status = OFF;
	}
	Pixel (int a, int b, StatusType s)
	: Point(a, b)
	{
		status = s;
	}

};	

int main ()
{
	Pixel onePixel (1, 1, ON);
	Pixel origin;

	cout << fixed << showpoint << setprecision(1);
	cout << "\nThe distance from origin to onePixel is: ";
	cout << onePixel.Distance(origin);

	cout << "\n\n Done. \n\n";
	return 0;
}