using System;

namespace Assignment3Q6
{
    class Assignment3Q6
    {
        public static void Main (string[] args)
        {
            Car car = new Car();

            Console.Write("Enter the year of make: ");
            car.YearModel = int.Parse(Console.ReadLine());
            Console.WriteLine(car.YearModel);

            Console.Write("Enter the make of the car: ");
            car.Make = Console.ReadLine();

            Console.Write("Enter the current speed of the car: ");
            car.Speed = int.Parse(Console.ReadLine());

            char command;
            do {
                Console.Write("Enter 'A' for accelerate, 'B' for brake, 'P' for print, or 'Q' for quit => ");
                command = Convert.ToChar(Console.ReadLine());
                command = Char.ToUpper(command);

                switch(command)
                {
                    case 'A':
                        car.Accelerate();
                        break;

                    case 'B':
                        car.Break();
                        break;

                    case 'P':
                        Console.WriteLine("The {0} {1} car is moving at a speed of {2}.",
                                  car.YearModel, car.Make, car.Speed);
                        break;

                    case 'Q':
                        break;

                    default:
                        Console.WriteLine("*** Error: invalid command");
                        break;
                }
            } while(command != 'Q');
        }
    }
}


-------------------------------------------


using System;
namespace Assignment3Q6
{
    public class Car
    {
        private int yearModel;
        private string make;
        private int speed;

        public Car ()
        {
            YearModel = Speed = 0;
            Make = "";
        }

        public Car(int _yearModel, string _make, int _speed) {
            YearModel = _yearModel;
            Make = _make;
            Speed = _speed;
        }

        public int YearModel
        {
            get { return yearModel; }
            set {
                if (yearModel >= 1895 && yearModel <= 2011) {
                    yearModel = value;
                }
            }
        }

        public string Make
        {
            get { return make; }
            set { make = value; }
        }

        public int Speed
        {
            get {return speed;}
            set {
                if (speed >= 0) {
                    speed = value;
                } else {
                    speed = 0;
                }
            }
        }

        public void Accelerate() {
            Speed += 10;
        }

        public void Break() {
            Speed -= 5;
        }
    }
}