Basic method calling before implementing interfaces

interface1.go

package main

import "fmt"

type Man struct {
	language string
	
	// other factors to decide if the girl would like you (for fun)
	name, nationality, build, eye_color string
	age, height uint8
	// you could be in debt, so we can't rule out negative values
	income int64
	// this is to remind her you are available
	married	bool
}

func (m Man) Greet() {
	switch m.language {
	case "British" : fmt.Println("Good morning, dear")
	case "American": fmt.Println("Mornin' there")
	case "Japanese": fmt.Println("Ohayou Gozaimasu")
	case "Thai"    : fmt.Println("Arunsawad Krub")
	default        : fmt.Println("Good morning")
	}
}

func main() {
	jay := new(Man)	// just leave other fields to 0
	jay.language = "Japanese"
	jay.Greet()	// print "Ohayou Gozaimasu"
}