（三十四）golang--接口

package main

import (
    "fmt"
)

type usb interface {
    start()
    stop()
}

type phone struct {
}

func (p phone) start() {
    fmt.Println("手机开始工作")
}

func (p phone) stop() {
    fmt.Println("手机停止工作")
}

type camera struct {
}

func (c camera) start() {
    fmt.Println("相机开始工作")
}

func (c camera) stop() {
    fmt.Println("相机停止工作")
}

type computer struct {
}

func (co computer) working(usb usb) {
    usb.start()
    usb.stop()
}

func main() {
    computer := computer{}
    phone := phone{}
    camera := camera{}
    computer.working(phone)
    computer.working(camera)
}