Go (interface)接口三

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// method project main.go
package main

import (
	"fmt"
)

type Human struct {
	name  string
	age   int
	phone string
}

type Student struct {
	Human
	school string
}

type Employee struct {
	Human
	company string
}

func (h *Human) SayHi() {
	fmt.Printf("Hi, I am %s  you can call me on %s\n", h.name, h.phone)
}

func (e *Employee) SayHi() {
	fmt.Printf("Hi, I am %s  you can call me on %s, I Work at %s\n", e.Human.name, e.phone, e.company)
}

type Stringer interface {
	String() string
}

func (s *Student) String() string {
	return fmt.Sprintf("Hi, I am %s, you can call me on %s, I study at %s\n", s.name, s.phone, s.school)
}

func main() {
	mark := Student{Human{"Mark", 25, "222-222-YYYY"}, "MIT"}
	sam := Employee{Human{"Sam", 45, "111-888-XXXX"}, "Golang Inc"}

	mark.SayHi()
	sam.SayHi()

	fmt.Println("Mark info :", mark.String())

	var s Stringer = &mark
	fmt.Println(s)
}

输出:

Hi, I am Mark  you can call me on 222-222-YYYY
Hi, I am Sam  you can call me on 111-888-XXXX, I Work at Golang Inc
Mark info : Hi, I am Mark, you can call me on 222-222-YYYY, I study at MIT

Hi, I am Mark, you can call me on 222-222-YYYY, I study at MIT

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