static void Main(string[] args)
{
var robot = new Robot();
var caretaker = new Caretaker();
var command = "";
Console.WriteLine("Robot (X = {0}, Y = {1})", robot.X, robot.Y);
while (command != "q")
{
Console.Write("Enter command (up|down|left|right|undo): ");
command = Console.ReadLine().Trim();
switch (command)
{
case "up": // go up
caretaker.AddMemento(robot.CreateMemento());
robot.Y++;
break;
case "down": // go down
caretaker.AddMemento(robot.CreateMemento());
robot.Y--;
break;
case "left": // go left
caretaker.AddMemento(robot.CreateMemento());
robot.X--;
break;
case "right": // go right
caretaker.AddMemento(robot.CreateMemento());
robot.X++;
break;
case "undo":
robot.SetMemento(caretaker.GetLastMemento());
break;
}
Console.WriteLine("X = {0}, Y = {1}", robot.X, robot.Y);
}
}
