rename function

contents/euclidean_algorithm/code/scala/euclidean.scala

@@ -9,9 +9,9 @@ object Euclid {
  }
 
  def euclid_mod(a: Int, b: Int): Int =
- b match {
- case 0 => a
- case _ => euclid_mod(b, a % b)
+ (Math.abs(a), Math.abs(b)) match {
+ case (_, 0) => a
+ case (a, b) => euclid_mod(b, a % b)
  }
 
  def main(args: Array[String]): Unit = {