小编pok*_*222的帖子

我读了一本作者这样做的书:

public enum Move
{  
    normal            = 0,
    swim              = 1 << 0,
    crawl             = 1 << 1,
    creep             = 1 << 3,
    jump              = 1 << 3,
    fly               = 1 << 4,
    grapple           = 1 << 5,
    goes_through_door = 1 << 6
}  

为什么要这样做,为什么不让他们有默认值,如0,1,2,3 ......

foreach(PlayerBase p in Members)
{
    p.Render();
}

该Members列表包含类型FieldPlayer或的成员GoalKeeper.FieldPlayer并GoalKeeper继承自PlayerBase.当我打电话时p.Render(),我需要Render拨打适当的电话FieldPlayer或GoalKeeper.我怎么做？

谢谢