auxiliary.scala

// primary constructor
class Pizza (var crustSize: Int, var crustType: String) {
  // one-arg auxiliary constructor
  def this(crustSize: Int) {
    this(crustSize, Pizza.DEFAULT_CRUST_TYPE)
  }
  // one-arg auxiliary constructor
  def this(crustType: String) {
    this(Pizza.DEFAULT_CRUST_SIZE, crustType)
  }
  // zero-arg auxiliary constructor
  def this() {
    this(Pizza.DEFAULT_CRUST_SIZE, Pizza.DEFAULT_CRUST_TYPE)
  }
  override def toString = s"A $crustSize inch pizza with a $crustType crust"
}
object Pizza {
  val DEFAULT_CRUST_SIZE = 12
  val DEFAULT_CRUST_TYPE = "THIN"
}

val p1 = new Pizza(Pizza.DEFAULT_CRUST_SIZE, Pizza.DEFAULT_CRUST_TYPE)
val p2 = new Pizza(Pizza.DEFAULT_CRUST_SIZE)
val p3 = new Pizza(Pizza.DEFAULT_CRUST_TYPE)
val p4 = new Pizza
val p5 = new Pizza(13, "LARGE")
println(p1)
println(p2)
println(p3)
println(p4)
println(p5)