Пример #1
0
 public override void Visit(GreatWall spot)
 {
     Console.WriteLine($"法国人游览长城{spot.ToString()}");
 }
Пример #2
0
 /// <summary>
 /// 参观长城
 /// </summary>
 /// <param name="spot"></param>
 public abstract void Visit(GreatWall spot);