class Point(x, y)
   method move(dx, dy)
      self.x +:= dx
      self.y +:= dy
   end

   method print()
      write("Point(", self.x, ", ", self.y, ")")
   end
end

procedure main()
   p := Point(10, 20)
   p.print()
   p.move(5, -3)
   p.print()
end