using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}

​

​

​

public class Turtle

{

    public Turtle()

    {

        //Turtle object (probably called canvas for you)

    }

    public void Forward(int x1, int y1, int x2, int y2)

    {

        g.DrawLine(p, x1, y1, x2, y2);

    }

}

​

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public abstract class Command

{

    public Turtle turtle;

    public int[] ParamsInt = new int[100];

    public bool valid;

​

    /// <summary>

    /// Constructor for empty command

    /// </summary>

    public Command()

    {

​

    }

    /// <summary>

    /// Constructor for command class that assigns the turtle object

    /// </summary>

    /// <param name="turtle">Turtle object so methods can be accessed</param>

    public Command(Turtle turtle)

    {

        this.turtle = turtle;

    }

    public virtual void Set(Turtle turtle, params int[] list)

    {

        this.turtle = turtle;

        this.ParamsInt = list;

    }

​

​

    /// <summary>

    /// Execute command to return the turtle once a function has been activated

    /// </summary>

    /// <returns></returns>

    public abstract Turtle Execute();

​

}

​

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public class ForwardCommand : Command

    {

​

        private Turtle _turtle;

​

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        ///<inheritdoc cref="TurnRightCommand.TurnRightCommand"/>

        public ForwardCommand()

        {

​

        }

        ///<inheritdoc cref="TurnRightCommand(Turtle)"

        public ForwardCommand(Turtle turtle) : base(turtle)

        {

            _turtle = turtle;

        }

        ///<inheritdoc cref="TurnRightCommand.set(Turtle)"/>

        public void Set(Turtle turtle, params int[] list)

        {

            this._turtle = turtle;

            base.ParamsInt = list;

        }

        ///<inheritdoc cref="TurnRightCommand.Execute"/>

        public override Turtle Execute()

        {

            _turtle.forward(ParamsInt[0]);

            return _turtle;

        }

    }

​

​

​

        public class CommandFactory

        {

            /// <summary>

            /// getCommand method that is used to call user commands

            /// </summary>

            /// <param name="command">String to determine which command a user wants to call</param>

            /// <returns>Returns an instance of the command a user has requested. Retruns null if command doesn't

            /// exist</returns>

            public Command getCommand(String command)

            {

                command = command.ToUpper().Trim();

​

                if (command.Equals("FORWARD"))

                {

                    return new ForwardCommand();

                }

                else

                {

                    MessageBox.Show("Command does not exist");

                    return null;

                }

            }

        }

​

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public class Parser

{

    public void programParser(String line)

    {

        //Parse shit here so you know what command you want to execute

​

                if (command.Equals("forward")) //Runs this code if the text equals forward

                {

                    ForwardCommand c = (ForwardCommand)cf.getCommand("forward");

                    c.Set(turtle, ParamsInt[0]);

                    c.Execute();

                }   

    }

​

}

​

​

​

​