//定义一个枚举 Direction 枚举字符名字

enum Direction{

    case North

    case South

    case East

    case West

};

enum Direction2{

    case North, South, East, West

}

//声明一个枚举

var  d = Direction.North;

var  d2 = Direction.East;

var  d3 :Direction = .West;

// 相当于 C语言 的  自主赋值枚举

enum Course :Int {

    case android = ,

            IOS  = ,

    WindowsPhone =

}

d2 = .South; //因为 d2 肯定 是 Direction 的一个枚举类型 所以可以这么写

        switch  d2 {

        case .North :

            print("north")

            break

        case .South :

            print("south")

            break

        default:

            print("others")

        }

        let c = Course.IOS

        var v = c.rawValue //  把枚举类型转换为 Int 类型

        print("\(v)")