3. Program Flow

Activity 3.01: Number-Guessing Game

Solution

1. Create a Ruby source file called hilow.rb.
2. Create the basic program architecture that allows a user to choose to play or exit:

   play_choice = 'y'
   while play_choice == 'y'
     puts "Welcome to HiLow - Shall we play"
     play_choice = gets.chomp.downcase
     if play_choice == 'y'
       play_game
     end
   end
   puts "Thanks for playing!"

3. Implement a single guess method that will employ various conditions for guessing a number. It will suggest that the player guesses lower/higher if the guess is incorrect:

   def try_guess(magic_number, guess)
     if guess == magic_number
       puts "You guess correctly!"
       return true
     elsif guess < magic_number
       puts "Guess higher"
       return false
     ...