Assignment_01/src/main/scala/Main.scala

   1 package org.gburri
   2
   3 object Main {
   4   val epsilon = 0.0001
   5   def isGoodEnough(x1: Double, x2: Double) = Math.abs(x1 - x2) < epsilon
   6   def improve(x: Double, a: Double) = x - (x * x - a) / (2 * x)
   7
   8   def sqrt(a: Double, x: Double = 10): Double = {
   9     val xNext = improve(x, a)
  10     if (isGoodEnough(x, xNext)) xNext
  11     else sqrt(a, xNext)
  12   }
  13
  14   def main(args: Array[String]): Unit = {
  15     println("Assignment 1 / Question 2 :")
  16     printf(" sqrt(9) : %f\n", sqrt(9))
  17     printf(" sqrt(612) : %f\n", sqrt(612))
  18   }
  19 }