interface-1.md

接口1

package main

import (
	"fmt"
)

type People interface {
	Speak(string) string
}

type Stduent struct{}

func (stu *Stduent) Speak(think string) (talk string) {
	if think == "bitch" {
		talk = "You are a good boy"
	} else {
		talk = "hi"
	}
	return
}

func main() {
	var peo People = Stduent{}
	think := "bitch"
	fmt.Println(peo.Speak(think))
}

以上代码会报错：

cannot use Stduent literal (type Stduent) as type People in assignment:
	Stduent does not implement People (Speak method has pointer receiver)

这是因为Speak 的receiver 是一个指针，而不是一个对象，Speak 的实现是*Student 类型， 不是Student 类型， 所以报错

如果我们把main 函数里的Student{} 改成&Student 则编译通过