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

namespace Oroklodes
{
    abstract class Human
    {
        public abstract void Knocking(); //nem tartalmaz implementációt

    }

    class Butcher : Human
    {
        public override void Knocking();

    }
    abstract class Scientist : Human
    {
        protected string name; //védett láthatóság

        public virtual void Knocking()
        {
            Console.WriteLine("Knock-knock, this is {0}", this.name);
        }

        public Scientist(string name)
        {
            this.name = name;
        }
    }

    class Physicist : Scientist //fizikus örököl a tudós osztálytól
    {
        protected int iq;

        public Physicist(string name, int iq)
            : base(name) //valemlyik osének a példányára mutat
        {
            this.iq = iq;
        }

        public override void Knocking()
        {
            for (int i = 0; i < 3; i++)
            {
                base.Knocking();
                System.Threading.Thread.Sleep(1000);
            }
        }
    }

    class NuclearPhysicist : Physicist
    {
        public NuclearPhysicist(string name, int iq)
            : base(name, iq)
        {

        }

        public override void Knocking()
        {
            base.Knocking();
            Console.WriteLine("Még valami más");
        }

        public void Publish()
        {
            Console.WriteLine("Írtam egy cikket!!!!!44444!!");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {

        //   Scientist A = new Scientist("Amy");

            Physicist S = new Physicist("Sheldon", 150);

            Scientist R = new Physicist("Rajesh", 145);

            Physicist L = new NuclearPhysicist("Leonard", 145);


            Scientist[] scientists = new Scientist[] { S, R, L };
            foreach (Scientist s in scientists)
            {
                s.Knocking();
                if (s is NuclearPhysicist)
                {
                    (s as NuclearPhysicist).Publish();
                }


            }

        }
    }
}