package main

import "fmt"

type vehicle struct {
	name string
}

func (v vehicle) describe() {
	fmt.Printf("%s is a vehicle.\n", v.name)
}

type car struct {
	vehicle
}

func (c car) describe() {
	fmt.Printf("%s is a car.\n", c.name)
}

func main() {
	cart := vehicle{name: "Cart"}
	beetle := car{vehicle: vehicle{name: "Beetle"}}

	cart.describe()   // Cart is a vehicle.
	beetle.describe() // Beetle is a car.
}