// 下棋
public static void Play(Chessman chess)
{
// 保存备忘录
mementoCaretaker.SetMemento(chess.Save());
index++;
Console.WriteLine("棋子 {0} 当前位置为 第 {1} 行 第 {2} 列", chess.Label, chess.X, chess.Y);
}
public static void SingleRedoDemo()
{
MementoCaretaker mc = new MementoCaretaker();
Chessman chess = new Chessman("车", 1, 1);
Display(chess);
// 保存状态
mc.Memento = chess.Save();
chess.Y = 4;
Display(chess);
// 保存状态
mc.Memento = chess.Save();
Display(chess);
chess.X = 5;
Display(chess);
Console.WriteLine("---------- Sorry，俺悔棋了 ---------");
// 恢复状态
chess.Restore(mc.Memento);
Display(chess);
}