5.4

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

namespace ConsoleApp24
{
    class Program
    {
        static void Main(string[] args)
        {
            Bus bus = new Bus();
            Tracktor tracktor = new Tracktor();
            Auto auto = new Auto();
            bus.Beep();
            tracktor.Beep();
            auto.Beep();


        }
    }


  public abstract class Vehicle
    {
        public string name;

        public virtual void Beep()
        {
            Console.WriteLine("Claxon");

        }

    }

    public class Bus : Vehicle
    {
        public override void Beep()
        {
            Console.WriteLine("Booooop");
        }
    }
    class Tracktor : Vehicle
    {
        public override void Beep()
        {
            Console.WriteLine("Bup");
        }
    }
    class Auto : Vehicle
    {
        public override void Beep()
        {
            base.Beep();
        }

    }
}