interface.go

package main

import "fmt"

type Sayer interface {
	say()
}

type Move interface {
	move()
}

type dog struct {
	name string
}

type cat struct{}

func (d dog) say() {
	fmt.Println("Hello, dog!")
}

func (d dog) move() {
	fmt.Println("dog move!")
}

func (c cat) say() {
	fmt.Println("Hello, cat!")
}

func interfaceCase() {
	fmt.Println("=====接口case=====")

	var dogSayer dog
	dogSayer.say()

	//接口类型变量
	var x Sayer
	a := dog{}
	b := cat{}
	x = a
	x.say()

	x = b
	x.say()

}

type People interface {
	Speak(string) string
}

type StudentA struct{}

func (stu *StudentA) Speak(think string) (talk string) {
	if think == "sb" {
		talk = "你是个大帅比"
	} else {
		talk = "您好"
	}
	return
}