GCD

object Test {
  def GCD(a: Int, b: Int): Int = {
    a%b match {
      case 0 => b
      case _ => GCD(b, a%b)
    } // match
  } // def

  def main(args: Array[String]) {
    println(GCD(16,28)) // should print 4
  } // main
} // object