class arthropod (NumberOfEyes: Int, NumberOfFeet : Int) {
def numberOfFeet () = println(NumberOfFeet)
def numberOfEyes () = println(NumberOfEyes)
}
val ant = new arthropod(2,6)
ant.numberOfFeet()
ant.numberOfEyes()
class insect (NumberOfEyes: Int) extends arthropod (NumberOfEyes, 6){ }
val bee = new insect(4)
bee.numberOfFeet()
bee.numberOfEyes()