interfaces.go

package main

import "fmt"

type Animal interface {
	Says() string
	NumberOfLegs() int
}

type Dog struct {
	Name  string
	Breed string
}
type Gorilla struct {
	Name          string
	Color         string
	NumberOfTeeth int
}

func main() {

	dog := Dog{
		Name:  "Samantha",
		Breed: "GermanShepard",
	}
	PrintInfo(&dog)

	goriilla := Gorilla{
		Name:          "Jock",
		Color:         "red",
		NumberOfTeeth: 38,
	}
	PrintInfo(&goriilla)

}

func PrintInfo(a Animal) {
	fmt.Println("This animal says", a.Says(), "and has", a.NumberOfLegs(), "legs")
}

func (d *Dog) Says() string {
	return "Woof"
}
func (d *Dog) NumberOfLegs() int {
	return 4

}

func (d *Gorilla) Says() string {
	return "Goo"
}
func (d *Gorilla) NumberOfLegs() int {
	return 2

}