Merge pull request #708 from serranojl/main

Ruby version for Stars

82_Stars/ruby/stars.rb

@@ -0,0 +1,90 @@
+class Stars
+  MAX_NUM = 100
+  MAX_GUESSES = 7
+
+  def start
+    print "Do you want instructions? (Y/N) "
+    response = gets.chomp!
+
+    if response.upcase[0] == "Y"
+      print_instructions()
+    end
+
+    still_playing = true
+    while still_playing
+      secret_number = rand(1..MAX_NUM)
+      puts "\n\nOK, I am thinking of a number, start guessing."
+
+      guess_number = 0
+      player_has_won = false
+
+      while (guess_number < MAX_GUESSES) and not player_has_won
+        puts "\n"
+        guess = get_guess()
+        guess_number += 1
+
+        if guess == secret_number
+          player_has_won = true
+            puts "**************************************************!!!"
+            puts "You got it in #{guess_number} guesses!!!\n\n"
+        else
+          print_stars(secret_number, guess)
+        end
+      end
+
+      if not player_has_won
+        puts "\nSorry, that's #{guess_number} guesses, number was #{secret_number}\n"
+      end
+
+      print "Play again? (Y/N) "
+      response = gets.chomp!
+
+      if response.upcase[0] != "Y"
+        still_playing = false
+      end
+      
+    end
+  end
+
+  private
+    def print_instructions
+      puts "I am thinking of a whole number from 1 to #{MAX_NUM}"
+      puts "Try to guess my number.  After you guess, I"
+      puts "will type one or more stars (*).  The more"
+      puts "stars I type, the closer you are to my number."
+      puts "one star (*) means far away, seven stars (*******)"
+      puts "means really close!  You get #{MAX_GUESSES} guesses."
+    end
+
+    def get_guess
+      valid_response = false
+      while not valid_response
+        print "Your guess? "
+        guess = gets.chomp!
+
+        if guess.match?(/[[:digit:]]/)
+          valid_response = true
+          guess = guess.to_i
+        end
+      end
+
+      return guess
+    end
+
+    def print_stars secret_number, guess
+      diff = (guess - secret_number).abs
+      stars = ""
+      for i in 0..7
+        if diff < 2**i
+          stars += "*"
+        end
+      end
+      print(stars)
+    end
+end
+
+
+if __FILE__ == $0
+  stars = Stars.new
+  stars.start()
+end