Minor program 1 : Guess the number

guessthenumber.rb

# Guess the number, minor program written in Ruby by Lukasz Piliszczuk (12007707)

MAX_TRIES = 10 # We define the max number of tries in a constant

puts "Welcome to the game Guess the number, written in ruby"
puts "Guess the number between 0 et 100, and you have #{MAX_TRIES} tries to do that"

guess_number = rand(0..100) # We use the rand() function to generate a pseudo-random number between 0 and 100 (both included)
guess_tries = 1 # The number of tries for the user, initialized at 1 because at the beginning it will be the first try

# Main game loop which will stop after the user found the number or exceed the max allowed tries
while guess_tries <= MAX_TRIES do
	puts "This is your #{guess_tries} try, guess the number"

	# Get the user input with gets.chomp, which returns the input in a String format
	# If the user enters a valid integer then the Integer() method will convert the string to the associated Integer
	# If not, the Integer() method will throw an exception which will be catched in the rescue block
	begin
		number = Integer(gets.chomp) 
	rescue
		puts "You must enter a valid number between 1 and 100, try again"
		next # We use the next function to return to the beginning of the loop, to ask the user to enter a new valid number
	end

	# If the user's number is the same than the number to guess, we exit the main loop
	break if number == guess_number

	# If not we tell the user if his number is too high or too low than the number to guess
	if number > guess_number
		puts "Too high, try again"
	else
		puts "Too low, try again"
	end

	# Finally we increment the number of tries for the user
	guess_tries += 1
end

# At this point the game is finished because the user exceeded the max number of attempts or because he found the number
if number == guess_number
	puts "Congrats, you found the number #{guess_number} in #{guess_tries} try"
else
	puts "Sorry the number to find was #{guess_number}, maybe next time"
end