#! ruby
# @author  Kazuhiro Yoshida (moriq)
# @version 0.1  1998.6
# @code    sjis

class Link
  attr("text")
  attr("jump")
  
  def initialize(text, jump)
    @text = text
    @jump = jump
  end
  
end

class Suit
  attr("text")
  attr("link")
  
  def initialize(text, link)
    @text = text
    @link = link
  end
  
  def println
    cnt = 1
    print @text
    for i in @link
      print "#{cnt}: #{i.text} (#{i.jump})\n"
      cnt += 1
    end
  end
  
  def readfile(filename)
    if FileTest::file?(filename)
      file = open(filename, "r")
      @text = file.gets("\n\n")
      @link = []
      while file.gets
        list = split
        text = list.shift
        jump = list.shift
        link = Link.new(text, jump)
        @link.push(link)
      end
    else
      print "error: fail to read #{filename}\n\n"
    end
  end
  
end

suit = Suit.new(nil, [])
suit.readfile("adv.txt")
suit.println

while TRUE
  print "> "
  ch = gets.to_i
  print "\n"
  if ch == 0 then exit(1) end
  ch -= 1
  if defined?(suit.link[ch].jump)
    jump = suit.link[ch].jump
    suit.readfile("#{jump}.txt")
    suit.println
  else
    print "error: fail to jump\n\n"
  end
end