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

namespace WS201ß
{
    class Koord
    {
        int x, y;

        public Koord(int x, int y)
        {
            this.x = x;
            this.y = y;
        }

        static public Koord operator *(Koord k, int faktor)
        {
            return new Koord(k.x * faktor, k.y * faktor);
        }

        static public Koord operator +(Koord l, Koord m)
        {
            return new Koord(l.x + m.x, l.y + m.y);
        }

        public override string ToString()
        {
            return "(" + x + "," + y + ")";
        }
    }

    class Adresse
    {
        protected string Name;
        protected string Straße;
        protected string PLZ;

        public Adresse(string name, string straße, string plz)
        {
            this.Name = name;
            this.Straße = straße;
            this.PLZ = plz;
        }

        public override string ToString()
        {
            return "Name: " + Name + " Straße: " + Straße + " PLZ: " + PLZ;
        }
    }

    class Mail
    {
        protected int id;
        protected Adresse from, to;
        protected bool delivered = true;
        static int ID;

        public Mail(Adresse von, Adresse zu)
        {
            this.from = von;
            this.to = zu;
            this.id = ID;
            ID++;
        }

        public override string ToString()
        {
            return "Von: \n" + from + "\nZu: \n" + to;
        }
    }

    class Letter : Mail
    {
        public enum Typ { Standartbrief, Eilbiref };
        private Typ t;

        public Letter(Adresse von, Adresse zu, Typ t)
            : base(von, zu)
        {
            this.t = t;
        }

        public override string ToString()
        {
            return "Von: \n" + from + "\nZu: \n" + to + "Typ: \n" + t;
        }

    }

    class Program
    {
        static void Main(string[] args)
        {
            //Koord k1 = new Koord(3, 4);
            //Koord k2 = new Koord(1, 2);
            //Koord k3 = (k1 + k2) * 2;
            //Console.WriteLine(k3);

            Adresse a1 = new Adresse ("Christian", "Sperberstraße 52", "90461");
            Adresse a2 = new Adresse ("Hans", "Wiesenweg 11", "90000");
            Adresse a3 = new Adresse("Norbert", "Musterweg 1", "91111");
            Adresse a4 = new Adresse("Simone", "Lachweg 2", "95445");

            Mail[] arr = new Mail[2];
            arr[0] = new Mail(a1, a2);

            foreach (Mail i in arr)
            {
                Console.WriteLine(i.ToString());
            }


        }
    }
}