package main
import "fmt"

type Animal interface {
    feed()
}
type Dog struct {
    name string
}
func (d *Dog) feed() {
    fmt.Println(d.name, "the dog eats")
}
type Cat struct {
    name string
}
func (c *Cat) feed() {
    fmt.Println(c.name, "the cat eats")
}
func main() {   
    var jake Animal = &Dog{"Jake"}
    var kam Animal = &Cat{"Kaminari"}    
    animals := []Animal{jake, kam}
    feedAnimals(animals)    
}
func feedAnimals(animals []Animal) {
    for _, animal := range animals {
        animal.feed()
    }
}