009_swift_枚举

enum Orientation{
    case North
    case South
    case East
    case West
}
Orientation.South
enum Fruit{
    case Apple,Banana,Orange,Peach,Watermelong
}
var myFavorite=Fruit.Apple
myFavorite = .Orange
let somePlanet = Orientation.East
switch somePlanet {
case .East:
    print("Where the sun rises.")
default:
    print("Where the sun dosen't rise")
}
enum ASCIICharacter: Character{
    case Tab="\t"
    case LineFeed="\n"
    case CarriageReturn="\r"
}
ASCIICharacter.Tab