interface Printable
  method print()
end interface

interface Resettable
  method reset()
  method active() as boolean
end interface

class Counter implements Printable, Resettable
  private word value
  private byte[4] history

  public method init(start as word)
    var copy as word
    copy = start
    self.value = copy
    self.history[0] = 0
  end method

  public method destroy()
    self.value = 0
    return
  end method

  public method print()
    print self.value
  end method

  public method reset()
    self.value = 0
  end method

  public method active() as boolean
    if self.value <> 0
      return true
    else
      return false
    end if
  end method
end class

program Main
  var count as Counter
  var output as Printable
  count = new Counter(10)
  output = count
  output.print()
  delete output
end program