8 import java.awt.image.BufferedImage

     8 import java.awt.image.BufferedImage

     9 import javax.swing.JFrame

     9 import javax.swing.JFrame

    10 import javax.swing.JPanel

    10 import javax.swing.JPanel

    11 import javax.swing.WindowConstants

    11 import javax.swing.WindowConstants

    12 import scala.language.implicitConversions    

    12 import scala.language.implicitConversions    

    13 

    14 

    14 // complex numbers

    15 // complex numbers

    15 case class Complex(val re: Double, val im: Double) { 

    16 case class Complex(val re: Double, val im: Double) { 

    16   // represents the complex number re + im * i

    17   // represents the complex number re + im * i

    17   def +(that: Complex) = Complex(this.re + that.re, this.im + that.im)

    18   def +(that: Complex) = Complex(this.re + that.re, this.im + that.im)