guessing_game.rb

#!env ruby

# Create a guesing game, where the program "guesses" a random number between 1 and 100 that the user specifies
# We then tell the computer if the number is higher or lower than its guesses

max = 100
min = 1
remaining_guesses = 6
first_guess = rand(100) + 1

while remaining_guesses > 1
	remaining_guesses -= 1
	guess = first_guess

	if remaining_guesses == 5
		puts "I will guess the number #{first_guess}."

		puts "Did I get the right number?  Or should my next guess bigger or smaller?"

		# If the guess is too big, the user should type smaller - or bigger, if it is too small
		user_response = gets.chomp

		# The computer uses the response to guess its next number
		if user_response == "smaller"
			puts "The number you are looking for is smaller than your guess."
			max = guess
		elsif user_response == "bigger"
			puts "The number you are looking for is bigger than your guess."
			min = guess
		else
			puts "Whew, I got it on the first try!"
			exit 0
		end
	
	else
		guess = (min + max) / 2
		puts "I will guess the number #{guess}."
		puts "Did I get the right number?  Or should my next guess bigger or smaller?"

		# If the guess is too big, the user should type smaller - or bigger, if it is too small
		user_response = gets.chomp

		# The computer uses the response to guess its next number
		if user_response == "smaller"
			puts "The number you are looking for is smaller than your guess."
			max = guess
		elsif user_response == "bigger"
			puts "The number you are looking for is bigger than your guess."
			min = guess
		else
			puts "Bwahahahahaa, I win!"
			exit 0
		end
	end
end

# The computer concedes defeat
puts "Blast - I ran out of guesses.  Nicely done!"