go语言继承和多态

package a

type Animal interface {
   call()
}

type Dog struct {
}

type Cat struct {
}

func (dog Dog) call() {
   println("我是狗，狗叫")
}

func (cat Cat) call() {
   println("我是猫，猫叫")
}
func main() {
   println("hello")
   var animal Animal
   animal = new(Dog)
   animal.call()

}