chapter-6--master-quiz-q3

question_3.rb

# Write an adventure game that the player plays from the command line
# by typing in the commands `north` and `south`.  The game should have
# this behaviour:
# * Two rooms: a passage and a cave.
#   * Passage commands
#     * `north`: `puts`es `You are in a scary cave.`
#   * Cave commands
#     * `south`: `puts`es `You are in a scary passage.`
#     * `north`: `puts`es 'You walk into sunlight.` and the program
#                stops executing.
# * The player starts in the passage.
# * When the player starts the game, the game shouldn't `puts` a room
#   description until the player moves between rooms.
# * If the player enters a command that is incorrect for the
#   situation, nothing happens and nothing is `puts`ed.
#
# * Note: To stop the program when the user wins, don't use `exit` to
#   quit the program because this will break the automated tests.  To
#   exit a while loop early, use the `break` keyword.
#
# * Note: When you run the automated tests, the tests will simulate
#   the user input.  You shouldn't need to enter any input manually.
#   If the tests hang when you run them, it probably means your code
#   doesn't work correctly, yet.

# FUNCTION DEFINITIONS

def passage_start
  puts "\nYou can only go north from here. Where do you want to go?"
  gets.chomp
end

def cave_choice
  puts "\nYou are in a scary cave."
  puts "Which direction would you like to go?"
  gets.chomp
end

def cave_to_south
  puts "\nYou are in a scary passage."
  passage_start
end

def cave_to_north
  puts "\nYou walk into sunlight."
end

def start
# This loop continues until 'north' is input
# as it is the only permissible direction whilst
# you're in the passage.
  while true
    choice_1 = passage_start
    if choice_1 == "north"
      break
# breaks out of this enclosing while loop into the
# outermost while loop, to take you to the cave loop
    end
  end
end

## MAIN

while true
  start
# Cave Loop
  while true
    choice_2 = cave_choice
    if choice_2 == "south"
      cave_to_south # Back to the starting passage
    elsif choice_2 == "north"
      cave_to_north
      break
    end
  end
  break
end

puts "\nTHE GAME HAS FINISHED."