1. package play
    3. import "fmt"
    5. type Player interface {
    6.     Play(source string, name string)
    7. }
    9. var p Player
    11. func PlayAll(source, mytype, name string) {
    13.     switch mytype {
    14.     case "MP3":
    15.         p = &MP3Player{}
    16.     case "WAV":
    17.         p = &WAVPlayer{}
    18.     default:
    19.         fmt.Println("UnSported music type", mytype)
    20.         return
    21.     }
    22.     p.Play(source, name)
    23. }