import scala.math._
import util.control.Breaks._

object Bisekcja extends App {

def rownanie(x:Double):Double = sqrt(log(x+2))

def oblicz(a:Double,b:Double): Unit ={
  var x1:Double = a
  var x2:Double = b
  var x:Double = 0
  var y:Double = 0
  var y1:Double = 0

  breakable {
    while (true) {
      println("x1 "+x1+" x2 "+x2)
        x = (x1 + x2) / 2
        y = rownanie(x)
        y1 = rownanie(x1)
        if (y.abs < 0.01) {
          println(x)
          break
        }
        if (y * y1 > 0)
          x1 = x
        else
          x2 = x
    }
  }
}
  oblicz(-1.0,4.5)
}








-----------wynik-----------
x1 -1.0 x2 4.5
x1 -1.0 x2 1.75
x1 -1.0 x2 0.375
x1 -1.0 x2 -0.3125
x1 -1.0 x2 -0.65625
x1 -1.0 x2 -0.828125
x1 -1.0 x2 -0.9140625
x1 -1.0 x2 -0.95703125
x1 -1.0 x2 -0.978515625
x1 -1.0 x2 -0.9892578125
x1 -1.0 x2 -0.99462890625
x1 -1.0 x2 -0.997314453125
x1 -1.0 x2 -0.9986572265625
x1 -1.0 x2 -0.99932861328125
x1 -1.0 x2 -0.999664306640625
x1 -1.0 x2 -0.9998321533203125
-0.9999160766601562