using System;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

using System.Text;

using System.Threading.Tasks;

​

namespace ConsoleApp2

{

    internal class Program

    {

        static void Main(string[] args)

        {

            vehicle vehicle = new vehicle("BMW", "530i", 2015);

            vehicle.DisplayInfo();

            car car = new car(4, 20000, "BMW", "530i", 2015);

            car.DisplayInfo();

            Console.WriteLine("\n\n");

​

​

            vehicle vehicle1 = new vehicle("Ford", "F150", 2012);

            car car1 = new car(4, 25000, "Ford", "F150", 2012);

            vehicle vehicle2 = new vehicle("Pontiac", "Redbird", 1983);

            car car2 = new car(2, 10000, "Pontiac", "Redbird", 1983);

            vehicle[] array = { vehicle1, car1, vehicle2, car2 };

            foreach (vehicle i in array)

            {

                i.start();

            }

        }

    }

​

    internal class vehicle

    {

        public string make;

        public string model;

        public int year;

        public vehicle()

        {

            make = "blank";

            model = "blank";

            year = 0;

        }

        public vehicle(string make, string model, int year)

        {

            this.make = make;

            this.model = model;

            this.year = year;

        }

​

        public void DisplayInfo()

        {

            Console.WriteLine($"This is a {year} {make} {model}");

        }

​

        public virtual void start()

        {

            Console.WriteLine("The Vehicle is starting");

        }

    }

​

    internal class car : vehicle

    {

        public int numOfDoors;

        public int price;

​

        public car(int numOfDoors, int price, string make, string model, int year) : base(make, model, year)

        {

            this.numOfDoors = numOfDoors;

            this.price = price;

        }

​

        public void DisplayInfo()

        {

            Console.WriteLine($"This is a {year} {make} {model}, has {numOfDoors} doors and is worth {price:C}");

        }

​

        public override void start()

        {

            Console.WriteLine($"The {make} {model} is starting");

        }

    }

​

​

}