using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;



namespace ConsoleApplication2
{
    #include <math.h>

    class Program
    {
        static void Main(string[] args)
        {
            Punkt p1 = new Punkt (10, 20);
            Punkt p2 = new Punkt (20, 40);
            System.Console.WriteLine("Punkt 1: " + p1.getX() + ", " + p1.getY());
            System.Console.WriteLine("Punkt 2: " + p2.getX() + ", " + p2.getY());

            Strecke S = new Strecke (p1, p2);

            System.Console.WriteLine("Length: " + S.getLength());
            System.Console.WriteLine("Slope: " + S.getSlope());

            System.Console.ReadKey();
        }
    }

    class Punkt
    {
        double x;
        double y;

        public Punkt (double x, double y)
        {
            this.x = x;
            this.y = y;
        }

        double getX()
        {
            return x;
        }

        double getY()
        {
            return y;
        }
    }

    class Strecke
    {
        Punkt p1;
        Punkt p2;

        public Strecke (Punkt p1, Punkt p2)
        {
            this.p1 = p1;
            this.p2 = p2;
        }

        //calculate the distance between 2 points
        double getLength ()
            return sqrt(pow(p2.getX()-p1.getX(),2)
                + pow(p2.getY()-p1.getY(),2));
        }

        //calculate the slope between 2 points
        double getSlope (){
            return (p2.getY()-p1.getY())/(p2.getX()-p1.getX());
        }
    }
}