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using System;

namespace LabTest
{
    class CarQ1
    {
        public string color;
    }

    class CarQ2
    {
        public int maxSpeed = 200;

        public void FullThrottle()
        {
            Console.WriteLine("The car is going as fast as it can!");
        }
    }

    class CarQ3
    {
        public string modelName;
        public int modelYear;

        public CarQ3(string name, int year)
        {
            modelName = name;
            modelYear = year;
        }
    }

    class BankAccount
    {
        private double _balance;

        public double Balance
        {
            get { return _balance; }
            set
            {
                if (value >= 0)
                {
                    _balance = value;
                }
                else
                {
                    Console.WriteLine("Invalid amount!");
                }
            }
        }
    }

    class Vehicle
    {
        public virtual void Honk()
        {
            Console.WriteLine("Tuut, tuut!");
        }
    }

    class CarQ5 : Vehicle
    {
        public override void Honk()
        {
            Console.WriteLine("Beep, beep!");
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            CarQ1 myObj1 = new CarQ1();
            myObj1.color = "Red";
            Console.WriteLine(myObj1.color);

            CarQ2 myObj2 = new CarQ2();
            Console.WriteLine($"Max Speed: {myObj2.maxSpeed} km/h");
            myObj2.FullThrottle();

            CarQ3 ford = new CarQ3("Mustang", 1969);
            Console.WriteLine($"{ford.modelYear} {ford.modelName}");

            BankAccount account = new BankAccount();
            account.Balance = 500;
            Console.WriteLine($"Current Balance: ${account.Balance}");
            account.Balance = -150;
            Console.WriteLine($"Current Balance: ${account.Balance}");

            Vehicle myVehicle = new Vehicle();
            Vehicle myCar = new CarQ5();
            myVehicle.Honk();
            myCar.Honk();
        }
    }
}