package mainimport (	"fmt")//define a use structtype user struct {	name  string	email string}//notyfy user recieve a methodfunc (u user) notify() {	fmt.Printf("Sending User Email to %s<%s>\n",		u.name,		u.email)}//changeEmail user make a method with pointerfunc (u *user) changeEmail(email string) {	u.email = email}//main is the entry of the programfunc main() {	bill := user{"Bill", "bill@email.com"}	bill.notify()		lisa := &user{"Lisa", "lisa@email.com"}	lisa.notify()		bill.changeEmail("bill@newdomain.com")	bill.notify()		lisa.changeEmail("lisa@newdomain.com")	lisa.notify()}