static void Main(string[] args)
{
ChessItem chess = new ChessItem("马", 1, 0);
chess.Display();
mgr.AddMemento(chess.Save());
index++;
chess.UpdatePos(2, 2);
chess.Display();
mgr.AddMemento(chess.Save());
index++;
chess.UpdatePos(3, 4);
chess.Display();
mgr.AddMemento(chess.Save());
index++;
chess.UpdatePos(4, 6);
chess.Display();
mgr.AddMemento(chess.Save());
index++;
chess.UpdatePos(5, 8);
chess.Display();
Console.WriteLine("Undo");
while (index >= 0)
{
Undo(chess);
}
Console.WriteLine("Redo");
Redo(chess);
Console.ReadKey();
}
private void UpdateChess(ChessItem chess, int x, int y)
{
chess.X = x;
chess.Y = y;
}
private static void Redo(ChessItem chess)
{
chess.Restore(mgr.GetMemento(++index));
chess.Display();
}
private static void Undo(ChessItem chess)
{
chess.Restore(mgr.GetMemento(index--));
chess.Display();
}
