hash_maze.rb

#!/usr/bin/ruby
# -*- coding: utf-8 -*-
def walk(hash, start, goal, level)
  cur = start
  level.times do |i|
    now = { cur, hash[cur] }
    puts "#{i+1}/#{level}: #{now.inspect}"
    cur = hash[cur]
    return false unless cur
    return true if cur == goal and (i+1) == level
  end
  return false
end

def bar
  puts "="*30
end

# main


bar
puts "迷路ゲーム"
puts "ようこそ！！！！！！"
bar

maze = { }
level = 0
until level > 0
  print "select level(0以上): "
  level = gets.to_i
end

level.times do
  maze[rand(level)] = rand(level)
end

start = rand(level)
goal = rand(level)


score = 0
loop do
  bar
  puts "start:#{start} goal:#{goal} score:#{score}"
  puts "maze=#{maze.inspect}"
  puts "mazeを更新して、回数通りにゴールに行きたいです。"
  bar
  print "> "
  begin
    input = eval(gets)
    maze.update( input ) if input.kind_of?(Hash)
  rescue
    puts "update error!!\n"
  else
    puts "mazeを更新しました"
    score += 1
  ensure
    puts "check"
    result = walk(maze, start, goal, level)
    if result
      puts "オメデトウ!!!"
      puts "score: #{score}"
      exit
    else
      puts "失敗しました"
    end
  end
end