package main

import (

"fmt"

)

type father struct {

name string

sex int

}

type sun struct {

father

age int

}

func main() {

m:=father{name:"father",sex:11}

s:=sun{father:father{name:"son",sex:12},age:14}

fmt.Println(s)

fmt.Println("name",s.name)

fmt.Println("name",m.name)

fmt.Println("sex",s.sex)

fmt.Println("sex",m.sex)

fmt.Println("age",s.age)

}

package main

import "fmt"

//接口，只是一个提示，不在接口定义中实现

type Handler interface {

    Do(k, v interface{})

}    

//使用接口

func Each(m map[string]int, h Handler) {

    if m != nil && len(m) > 0 {

        for k, v := range m {

            h.Do(k, v)

        }

    }

}

type welcome string

//接口实现处

func (w welcome) Do(k, v interface{}) {

    fmt.Printf("%s,我叫%s,今年%d岁\n", w,k, v)

}

func main(){

    persons := make(map[string]int)

    persons["张三"] = 20

    persons["李四"] = 23

    persons["王五"] = 26

    var w welcome = "大家好"

    Each(persons, w)

}