// Homework 27, challenge: Dog and friend.
//
// Build a dog struct with a name field and a friend field of type *dog. A nil
// friend means that the dog has no friend. Write:
//   newDog(name)      -- a function that returns a *dog with no friend
//   describe()        -- prints "<name> has no friend." or
//                        "<name> is friends with <friend's name>."
//
// Make two dogs and call describe on both. Then make one the friend of the
// other, and describe both again. Finally, change the friend's name through
// the friend field, and describe both once more.
//
// Run with: go run exercises/27/homework/04-dog-friend.go

package main

import "fmt"

// TODO: define the dog struct, newDog and describe here, outside main.

func main() {
	// TODO: write your code here, in place of this placeholder line:
	fmt.Println("TODO: replace this line")
}