package main

import "fmt"

type Humaner interface {

    SayHi()

}

type Personer interface {

    Humaner

    Sing(lrc string)

}

type Student struct {

    name string

    id int

}


//实现接口的sayhi

func (s *Student)SayHi()  {

    fmt.Printf("%s sayhi\n", s.name)

}

func (p *Student)Sing(lrc string)  {

    fmt.Printf("student %s sing %s\n", p.name, lrc)

}

func main() {
　　//定义一个接口的类型的变量

    var i Personer

    s := &Student{"mike", }

    i = s

    i.SayHi()

    i.Sing("loving you ")

}

mike sayhi

student mike sing loving you