Create tictactoe.ms

Author: chinhouse

00_Alternate_Languages/89_Tic-Tac-Toe/MiniScript/tictactoe.ms

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+// This program plays Tic Tac Toe
+// The machine goes first and the way this is set up
+// there's no way the human player can win. At best
+// it will be a draw.
+computerNext = function(x)
+	return x - 8 * floor((x - 1) / 8)
+end function
+
+print " " * 30 + "TIC TAC TOE"
+print " " * 15 + "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY"
+print; print; print
+
+print "The game board is numbered:"
+print
+print "1 2 3"
+print "8 9 4"
+print "7 6 5"
+print
+
+while true
+	computer = 9
+	gameOver = false
+	// MOVE ONE line 240 in original
+	// Computer always moves first and takes the center
+	print "Computer moves " + computer
+	player = input("Your move? ").val
+	playerFirstMove = player
+	
+	// MOVE TWO line 280
+	// Computer's 2nd move - always the next space clockwise
+	// from the player's
+	computer = computerNext(player + 1)
+	canWinAt = computerNext(computer+4)
+	print "Computer moves " + computer
+	player = input("Your move? ").val
+	
+	// MOVE THREE line 300
+	// Computer has two consecutive cells. This includes the
+	// middle so, to complete this 3-in-a-row, get the opposite
+	// value of comp's last move - which is four cells clockwise away.
+	
+	if player != canWinAt then
+		computer = canWinAt
+		print "Computer moves " + computer
+		print "... and wins ********"
+		gameOver = true
+	else
+		// Blocked - so two cells away from comp's last move
+		// line 360
+		computer = computerNext(computer + 2)
+		print "Computer moves " + computer
+	end if
+	
+	if gameOver == false then
+		canWinAt = computerNext(computer+4)
+		player = input("Your move? ").val
+		
+		// MOVE FOUR - line 400
+		if player != canWinAt then
+			computer = canWinAt
+			print "Computer moves " + computer
+			print "... and wins ********"
+			gameOver = true
+		else
+			// Foiled again! - line 450
+			if playerFirstMove % 2 == 0 then
+				computer = computerNext(computer + 7)
+				print "Computer moves " + computer
+				print "... and wins ********"
+				gameOver = true
+			else // line 500
+				computer = computerNext(computer + 3)
+				print "Computer moves " + computer
+			end if
+		end if
+	end if
+	
+	if gameOver == false then
+		// line 520
+		player = input("Your move? ").val
+		if player != computerNext(computer + 4) then
+			computer = computerNext(computer + 4)
+		else
+			computer = computerNext(computer + 6)
+		end if
+		print "Computer moves " + computer
+		print "The game is a draw."
+	end if
+	print
+end while