added print_balance function, linting

29_Craps/lua/craps.lua

@@ -40,10 +40,22 @@ local function input_number(prompt)
 end
 
 
+--- Print custom balance message depending on balance value
+local function print_balance(balance, under_msg, ahead_msg, even_msg)
+	if balance < 0 then
+		print(under_msg)
+	elseif balance > 0 then
+		print(ahead_msg)
+	else
+		print(even_msg)
+	end
+end
+
+
 --- Play a round and return winnings or losings.
 local function play_round()
-    -- Input the wager
-    local wager = input_number("Input the amount of your wager: ")
+	-- Input the wager
+	local wager = input_number("Input the amount of your wager: ")
 
 	-- Roll the die for the first time.
 	print("I will now throw the dice")
@@ -69,13 +81,11 @@ local function play_round()
 		return -wager
 	end
 
-	-- Any other number rolled becomes your "point." You continue to roll;
-	-- if you get your point you win. If you roll a 7, you lose and the dice
-	-- change hands when this happens.
+	-- Any other number rolled becomes the "point".
+    -- Continue to roll until rolling a 7 or point.
 	print(string.format("%d is the point. I will roll again", first_roll))
-	local second_roll
-	repeat
-		second_roll = throw_dice()
+	while true do
+		local second_roll = throw_dice()
 		if second_roll == first_roll then
 			-- Player gets point and wins
 			print(string.format("%d - a winner.........congrats!!!!!!!!", first_roll))
@@ -83,14 +93,14 @@ local function play_round()
 			return 2 * wager
 		end
 		if second_roll == 7 then
-			-- Player gets 7 and loses
+			-- Player rolls a 7 and loses
 			print(string.format("%d - craps. You lose.", second_roll))
 			print(string.format("You lose $ %d", wager))
 			return -wager
 		end
 		--  Continue to roll
 		print(string.format("%d  - no point. I will roll again", second_roll))
-	until second_roll == first_roll or second_roll == 7
+	end
 end
 
 
@@ -98,17 +108,17 @@ end
 local function craps_main()
 	-- Print the introduction to the game
 	print(string.rep(" ", 32) .. "Craps")
-    print(string.rep(" ", 14) .. "Creative Computing  Morristown, New Jersey\n\n")
+	print(string.rep(" ", 14) .. "Creative Computing  Morristown, New Jersey\n\n")
 	print("2,3,12 are losers; 4,5,6,8,9,10 are points; 7,11 are natural winners.")
 
-	-- Initialize random number generator seeed
+	-- Initialize random number generator seed
 	math.randomseed(os.time())
 
-    -- Initialize balance to track winnings and losings
+	-- Initialize balance to track winnings and losings
 	local balance = 0
 
 	-- Main game loop
-    local keep_playing = true
+	local keep_playing = true
 	while keep_playing do
 		-- Play a round
 		balance = balance + play_round()
@@ -116,24 +126,22 @@ local function craps_main()
 		-- If player's answer is 5, then stop playing
 		keep_playing = (input_number("If you want to play again print 5 if not print 2: ") == 5)
 
-		-- Print an update on money won
-		if balance < 0 then
-			print(string.format("You are now under $%d", -balance))
-		elseif balance > 0 then
-			print(string.format("You are now ahead $%d", balance))
-		else
-			print("You are now even at 0")
-		end
+		-- Print an update on winnings or losings
+		print_balance(
+			balance,
+			string.format("You are now under $%d", -balance),
+			string.format("You are now ahead $%d", balance),
+			"You are now even at 0"
+		)
 	end
 
 	-- Game over, print the goodbye message
-	if balance < 0 then
-		print("Too bad, you are in the hole. Come again.")
-	elseif balance > 0 then
-		print("Congratulations---you came out a winner. Come again.")
-	else
-		print("Congratulations---you came out even, not bad for an amateur")
-	end
+	print_balance(
+		balance,
+		"Too bad, you are in the hole. Come again.",
+		"Congratulations---you came out a winner. Come again.",
+		"Congratulations---you came out even, not bad for an amateur"
+	)
 end