Rock, Paper, Scissors Game

rock_paper_scissors.rb

# ends the game
def end_game
  puts "\nBye!"
end

# the game which recursively calls itself until user presses "X" to call end_game and finish the game
def game
	puts "==============================\nPlease choose one from the following:\n(R) Rock\n(P) Paper\n(S) Scissors\n(X) End game\n\n"
	user_turn = gets.chomp.capitalize!
	if user_turn != "R" && user_turn != "P" && user_turn != "S" && user_turn != "X"
		puts "\nHey, that's not something I recognize!"
		game
	elsif user_turn == "X"
   end_game
	else
		rand_num = 1 + rand(3)
		if rand_num == 1
			cpu_turn = "R"
		end
		if rand_num == 2
			cpu_turn = "P"
		end
		if rand_num == 3
			cpu_turn = "S"
		end
		puts "\nCPU got " << cpu_turn << "\n"

		winning_output = "You win! :)"
		losing_output = "You lost! ;("
		if user_turn == "R" && cpu_turn == "P"
			puts losing_output
		elsif user_turn == "R" && cpu_turn == "S"
			puts winning_output
		elsif user_turn == "P" && cpu_turn == "R"
			puts winning_output
		elsif user_turn == "P" && cpu_turn == "S"
			puts losing_output
		elsif user_turn == "S" && cpu_turn == "R"
			puts losing_output
		elsif user_turn == "S" && cpu_turn == "P"
			puts winning_output
		else
			puts "Tie game!"
		end
		game
	end
	
end

# intial greeting message
puts "Greetings!"
# initiates game
game