Cube in ruby

30_Cube/ruby/cube.rb

@@ -0,0 +1,261 @@
+$landmines = Array.new
+
+$currentLocation = "111"
+
+$standings = 500 # starting amount
+
+def getYesOrNoResponseTo prompt
+    print prompt
+    # strip leading and trailing whitespace from entry
+    yesno = gets.strip.upcase[0]
+    yesno == "Y"
+end
+
+def greeting
+    puts "CUBE".center(80)
+    puts "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY".center(80)
+    puts "\n\n\n"
+    response = getYesOrNoResponseTo "Do you want to see the INSTRUCTIONS?"
+    if response
+        puts "This is a game in which you will be playing against the"
+        puts "random decision of the computer. The field of play is a"
+        puts "cube of size 3. Any of your 27 locations can be designated"
+        puts "by inputting three numbers such as 231."
+        puts "At the start you are automatically at location 1,1,1.\n"
+        puts "The object of the game is to get to location 3,3,3.\n"
+
+        puts "\nONE MINOR DETAIL:"
+        puts "The computer will pick five random locations at which it will"
+        puts "plant land mines. if you hit one of these locations you lose.\n"
+
+        puts "\nONE OTHER DETAIL:"
+        puts "You may move only one space in one direction each move."
+        puts "For example: from 1,1,2 you may move to 2,1,2 or 1,1,3."
+        puts "You may not change more than one number on the same move."
+        puts "If you make an illegal move, you lose and the computer takes"
+        puts "the money you may have bet on that round."
+        puts ""
+        puts "When stating the amount of a wager, enter only the number"
+        puts "of dollars (example: 250)  You are automatically started with"
+        puts "500 dollars in your account."
+        puts 
+        puts "Good luck!"
+    end
+end
+
+def landMindStringFrom x, y, z
+    landMine = x.to_s + y.to_s + z.to_s
+    return landMine
+end
+
+def assignLandMines
+    $landmines.clear
+
+    # put five unique entries into the landmines array
+    while $landmines.size < 5 do
+        a = rand(3)+1
+        b = rand(3)+1
+        c = rand(3)+1
+        landmine = landMindStringFrom(a, b, c)
+        if !$landmines.include?(landmine) && landmine != "333"
+# puts landmine     # debugging
+            $landmines.push landmine
+        end
+    end
+    $currentLocation = "111"
+end
+
+def initializePot
+    $standings = 500 # starting amount
+end
+
+def startGame
+    assignLandMines
+    displayStandings
+    response = getYesOrNoResponseTo "WANT TO MAKE A WAGER? "
+    if response
+        print "HOW MUCH? "
+        while true do
+        wager = gets.strip.tr('^0-9', '').to_i
+            if $standings < wager
+                puts "TRIED TO FOOL ME; BET AGAIN ";
+            else
+                break
+            end
+        end
+    else
+        wager = 0
+    end
+
+    # start at location 1,1,1
+    $currentLocation = "111"
+    return wager
+end
+
+def goodbye
+    puts "TOUGH LUCK!"
+    puts ""
+    puts "GOODBYE."
+    exit
+end
+
+def bust
+    puts "YOU BUST."
+    goodbye
+end
+
+def tryAgain
+    again = getYesOrNoResponseTo "WANT TO TRY AGAIN? "
+    if not again
+        exit
+    end
+end
+
+def isLegalMove? newLocation
+    # test for illegal moves
+    # can only change one variable per move
+    # newLocation is the proposed new position
+    # can only move one space from the current position
+
+    moveX = newLocation[0].to_i
+    moveY = newLocation[1].to_i
+    moveZ = newLocation[2].to_i
+
+    # currentX, currentY, currentZ contains the current position
+    currentX = $currentLocation[0].to_i
+    currentY = $currentLocation[1].to_i
+    currentZ = $currentLocation[2].to_i
+
+    isLegalMove = true
+    errorString = ""
+   # ensure we're not moving off the cube
+    if not (moveX.between?(1,3) && moveY.between?(1,3) && moveZ.between?(1,3))
+        errorString = "You moved off the cube!"
+        return errorString
+    end
+
+    # test for only one move from current position
+    if not moveX.between?(currentX-1,currentX+1)
+        isLegalMove = false
+    end
+    if not moveY.between?(currentY-1,currentY+1)
+        isLegalMove = false
+    end
+    if not moveZ.between?(currentZ-1,currentZ+1)
+        isLegalMove = false
+    end
+        if not isLegalMove
+            errorString = "You've gone too far"
+        end
+
+    # only allow change to one variable at a time
+    if isLegalMove
+        if moveX != currentX
+            if moveY != currentY or moveZ != currentZ
+                isLegalMove = false
+            end
+        end
+        if moveY != currentY
+            if moveX != currentX or moveZ != currentZ
+                isLegalMove = false
+            end
+        end
+        if moveZ != currentZ
+            if moveY != currentY or moveX != currentX
+                isLegalMove = false
+            end
+        end
+        if not isLegalMove
+            errorString = "You made too many changes"
+        end
+   end
+
+    return errorString
+end
+
+def displayStandings
+    print "You now have " + $standings.to_s
+    if $standings > 1
+        puts " dollars"
+    else
+        puts " dollar"
+    end
+end
+
+def didWin? location
+    location == "333"
+end
+
+def youWin amount
+    $standings += amount
+    puts "*** You win " + amount.to_s + " dollars! ***\n\n"
+    displayStandings
+    tryAgain
+    assignLandMines
+    puts "*** new cube ***"
+    puts "different landmine locations"
+    puts "starting over at location 111"
+end
+
+def youLose amount
+    # subtract the bet amount from the standings
+    if amount > 0
+        puts "You lose " + amount.to_s + " dollars!\n\n"
+        $standings -= amount
+    end
+    if $standings <= 0
+        # no money left, so end the game
+        bust
+    else
+        displayStandings
+    end
+    tryAgain
+    $currentLocation = "111"
+    puts "starting over at location 111"
+end
+
+def landMine betAmount
+    puts "******BANG******"
+    puts "You hit a land mine at " + $currentLocation + "!"
+    youLose betAmount
+end
+
+def gameLoop betAmount
+    while true do
+        puts ""
+        print "IT'S YOUR MOVE:  "
+        # allow only integers: strip anything else from input
+        moveToLocation = gets.strip.tr('^0-9', '') 
+
+        # test for illegal moves
+        # can only change one variable per move
+        # moveToLocation is the proposed new position
+
+        error = isLegalMove?(moveToLocation)
+        if error == ""
+            # assign the new position
+            $currentLocation = moveToLocation
+
+            # test for win
+            if didWin?(moveToLocation)
+                youWin betAmount
+            end
+
+            # haven't won yet, test the land mines
+            if $landmines.include? moveToLocation
+                landMine betAmount
+            end
+
+        else
+            puts "Illegal move: " + error
+            youLose betAmount
+        end
+
+    end
+end
+
+
+greeting
+initializePot
+gameLoop startGame
+