import java.text.NumberFormat;

public class prgm1
{
	public static void main(String[] args)
	{

                ConsoleReader console = new ConsoleReader(System.in);
                String exit = "Y";
	        int i = 1;

                while(exit.equalsIgnoreCase("Y"))
                {
                        System.out.print("X1 Value: ");
                        double x1value = console.readDouble();

                        System.out.print("Y1 Value: ");
                        double y1value = console.readDouble();

                        System.out.print("X2 Value: ");
                        double x2value = console.readDouble();

                        System.out.print("Y2 Value: ");
                        double y2value = console.readDouble();

	                LinearCalc one = new LinearCalc(x1value, y1value, x2value, y2value);
       		        one.getSlope();
       		        one.getLength();
       		        one.getMidX();
       		        one.getMidY();
       		        one.getArea();
       		        one.getPerimeter();
       		        one.getCircleArea();
       		        one.getCircumference();
			System.out.println("------------------------------------------");
			System.out.println("Data Set " + i );
			System.out.println("------------------------------------------");
       		        one.Display();
       		        System.out.println();

                        System.out.print("Do you want to Continue [Y/y|N/n]: ");
                        ConsoleReader cont = new ConsoleReader(System.in);
                        String strexit = cont.readLine();
                        exit = strexit;
			i++;
                }

	}
}

class LinearCalc
{
	public LinearCalc(double X1, double Y1, double X2, double Y2)
	{
		x1 = X1;
		y1 = Y1;
		x2 = X2;
		y2 = Y2;
	}

	public LinearCalc(LinearCalc P)
	{
		x1 = P.x1;
		y1 = P.y1;
		x2 = P.x2;
		y2 = P.y2;
	}

	public double getSlope()
	{
		double m = (y2 - y1)/(x2 - x1);
		return m;
	}
	
	public double getLength()
	{
		double l = Math.sqrt(Math.pow(x2 - x1,2) + Math.pow(y2 - y1,2));	
		return l;
	}

	public double getArea()
	{
		double a = Math.abs(x2 - x1) * Math.abs(y2 - y1);
		return a;
	}
	
	public double getPerimeter()
	{
		double p = 2 * Math.abs(x2 - x1) + 2 * Math.abs(y2 - y1);
		return p;
	}
	
	public double getMidX()
	{
		double midX = (x2 - x1)/2;
		return midX;
	}

	public double getMidY()
	{
		double midY = (y2 - y1)/2;
		return midY;
	}
	
	public double getCircleArea()
	{
		double radius = getLength()/2;
		double ca = Math.PI * Math.pow(radius,2);
		return ca;
	}

	public double getCircumference()
	{
		double diameter = getLength();
		double cir = Math.PI * diameter;
		return cir;
	}	

	public void Display()
	{
		formatter.setMaximumFractionDigits(4);
		formatter.setMinimumFractionDigits(4);

		System.out.println("x1, y1   : (" + formatter.format(x1) + "," + formatter.format(y1) + ")");
		System.out.println("x2, y2   : (" + formatter.format(x2) + "," + formatter.format(y2) + ")");
		System.out.println();
		System.out.println("Slope    : " + formatter.format(getSlope()));
		System.out.println("Length   : " + formatter.format(getLength()));
		System.out.println("MidX pt  : " + formatter.format(getMidX()));
		System.out.println("MidY pt  : " + formatter.format(getMidY()));
		System.out.println("Area     : " + formatter.format(getArea()));
		System.out.println("Perimeter: " + formatter.format(getPerimeter()));
		System.out.println();
		System.out.println("Cir Area : " + formatter.format(getCircleArea()));
		System.out.println("Cir Circ : " + formatter.format(getCircumference()));
	}
	private double x1;
	private double y1;
	private double x2;
	private double y2;
	NumberFormat formatter = NumberFormat.getNumberInstance();
	
}