38_方法的重写

package main

import "fmt"

type Person struct {

	//和变量定义不同,不要写var关键字

	Id   int

	Name string

	Sex  byte

}

type Student struct {

	Person

	Hobby string

}

//改变接收者类型,可以实现方法重写

func (s Person) PrintValue() {

	fmt.Println("该方法receiver is person")

}

func (s Student) PrintValue() {

	fmt.Println("该方法receiver is student")

}

func main() {

	s1 := Student{Person{1, "steven", 'm'}, "running"}

	s1.PrintValue()        //就近原则

	s1.Person.PrintValue() //显示的调用上一层

}