C06PKF Example Program Data
    9                                           : n
      (1.0E0,-0.5E0)      (0.5E0,-0.25E0)
      (1.0E0,-0.5E0)      (0.5E0,-0.25E0)
      (1.0E0,-0.5E0)      (0.5E0,-0.25E0)
      (1.0E0,-0.5E0)      (0.5E0,-0.25E0)
      (1.0E0,-0.5E0)      (0.0E0,-0.25E0)
      (0.0E0,-0.5E0)      (0.0E0,-0.25E0)
      (0.0E0,-0.5E0)      (0.0E0,-0.25E0)
      (0.0E0,-0.5E0)      (0.0E0,-0.25E0)
      (0.0E0,-0.5E0)      (0.0E0,-0.25E0)       : xa, ya