object Nebeneffekt {
   var sharedMemory = 0
   def f: Int => Int = {(x) => sharedMemory * x}
   def g: Int => Int = {(x) => sharedMemory -= x; sharedMemory}
   
   def main(args: Array[String]) {
      sharedMemory = 1
      var out =   "f(1)=" + f(1) + ", g(1)=" + g(1)
      out    += "\nf(1)=" + f(1) + ", g(1)=" + g(1)
      javax.swing.JOptionPane.showMessageDialog(null, out, "Nebeneffekt", 2)
   }
}