go接口

// 接口例子
package main

import "fmt"

type Human struct {
	Name  string
	Age   int
	Sex   string
	Phone string
}
type Student struct {
	Human
	School string
	Id     string
}
type Employee struct {
	Human
	Company string
	Salary  float32
}

func (h *Human) SayHello() {
	fmt.Printf("Hello!,I am %s you can call me on %s\n", h.Name, h.Phone)
}
func (h *Human) Sing(lyrics string) {
	fmt.Println("La la la la ...", lyrics)
}
func (e *Employee) SayHello() {
	fmt.Printf("Hello!,I am %s ,I work at %s,you can call me on %s\n", e.Name, e.Company, e.Phone)

}

type Men interface {
	SayHello()
	Sing(lyrics string)
}

func main() {
	mike := &Student{Human{"Mike", 25, "boy", "222-222-XXX"}, "MIT", "00001"}
	paul := &Student{Human{"Paul", 26, "girl", "111-222-XXX"}, "Harvard", "00002"}
	sam := &Employee{Human{"Sam", 36, "girl", "444-222-XXX"}, "Golang Inc.", 1000}
	tom := &Employee{Human{"Tom", 37, "boy", "222-444-XXX"}, "Things Ltd.", 5000}
	var i Men
	i = mike
	fmt.Println("This is Mike ,a Student!")
	i.SayHello()
	i.Sing("葫芦娃,葫芦娃,啦啦啦啦,叮当叮叮当当葫芦娃....\n")
	//
	i = tom
	fmt.Println("This is Mike ,a Emploee!")
	i.SayHello()
	i.Sing("葫芦娃,葫芦娃,啦啦啦啦,叮当叮叮当当葫芦娃....\n")
	//
	x := make([]Men, 3)
	x[0], x[1], x[2] = paul, sam, mike
	for _, v := range x {
		v.SayHello()
	}
}