tryit.go

package main

import (
	"fmt"
)

type Human struct {
	name  string
	age   int
	phone string
}

// with pointer dereference
func (h *Human) Hi() {
	fmt.Printf("Hi, I am %s you can call me on %s\n", (*h).name, (*h).phone)
}
func (h *Human) SetName(name string) {
	(*h).name = name
}

// without pointer dereference
func (h *Human) SetAge(age int) {
	h.age = age
}
func (h *Human) GoodBye() {
	fmt.Printf("GoodBye, I am %s you can call me on %s\n", h.name, h.phone)
}

func main() {
	taku := Human{name: "Mike", age: 25, phone: "222-222-XXX"}
	taku.Hi()
	taku.GoodBye()
	fmt.Println("--change-------")
	taku.SetName("Taro")
	taku.SetAge(10)
	taku.Hi()
	taku.GoodBye()
}

/* output
Hi, I am Mike you can call me on 222-222-XXX
GoodBye, I am Mike you can call me on 222-222-XXX
--change-------
Hi, I am Taro you can call me on 222-222-XXX
GoodBye, I am Taro you can call me on 222-222-XXX
*/