using System;

public class Program

{

    public static void Main()

    {

        Car myCar = new Car();

        DetermineMarketValue(myCar);

        myCar.Year = 2003;

        Console.WriteLine(DetermineMarketValue(myCar));

        Console.WriteLine(myCar.DetermineMarketValue());

        myCar.Year = 1000;

        Console.WriteLine(myCar.DetermineMarketValue());

        static decimal DetermineMarketValue(Car car)

        {

            decimal carVal = 100.0M;

            return carVal;

        }

    }

    class Car

    {

        public string Make {get;set;}

        public string Model {get;set;}

        public int Year {get;set;}

        public string Color {get;set;}

        public Car()

        {

            Make = "Nissan";

        }

        public Car(string make, string model, int year, string color)

        {

            Make = make;

            Model = model;

            Year = year;

            Color = color;

        }

        public decimal DetermineMarketValue()

        {

            decimal carVal;

            if(Year > 1990)

                carVal = 10000;

            else

                carVal = 999;

            return carVal;

        }

    }

}