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I was bored and that can be a dangerous thing. Like doodling on the phone book while you are talking on the phone, I doodle code while answering questions on DIC. Yeah, it means I have no life and yes it means I was born a coder. During this little doodle I decided to make a slot machine. But not your standard slot machine per say, but one designed a little bit more like the real thing. Sure it could have been done a little more simpler and not even using a Wheel class at all, but what fun is that? In this entry I show the creation of a slot machine from a bit more of a mechanical aspect than a purely computerized one. It should provide a small sampling of classes and how they can represent real life machines. We cover it all right here on the Programming Underground!
So as I have already said, this little project was just something to play around with. It turned out kinda nice, so I thought I would share it. But what did I mean about it being mechanical in nature? Well, if you have ever played a real slot machine, not the digital ones they have in casinos now, you would see a metal case with a series of wheels. Typically it would be three wheels with pictures on them. When you put your money in and pull the handle the wheels would be set into motion. They would spin and then the first wheel would stop, followed by the second and then the third. After they have all stopped, the winnings are determined and you are paid out in coinage or credits.
I thought, why not be a bit mechanical in this slot machine design and create the wheels as a class called “Wheel” and give it the ability to spin independently of the other wheels? Have the wheel keep track of which picture (or in our case number) is flying by and report the results to the actual slot machine class. I could have done this mechanism without the need of a wheel at all and instead load up an array and have it randomly pick a number from the wheel. Little slimmer, little more efficient but wouldn’t show much programming theory.
What do we gain by recreating these Wheel classes and spinning them independently? Well, you gain a slight bit of flexibility. Independently we are able to control the speed of the spinning if we wanted to, we are able to grasp the idea of the wheel as a concept in our mind and manipulate it. We could easily built in features like if the wheel lands on a certain number it will adjust itself. Like some slots in Vegas, if you land on lets say a rocket in the center line, the machine would see the rocket and correct the wheel to spin backwards 1 spot (in the direction of the rocket as if the rocket was controlling the wheel). We could spin one wheel one way and another wheel another. We could inherit from that wheel and create a specialized wheel that does a slew of new different behaviors. All encapsulated into one solid object making the actual Machine class oblivious to the trickery of the wheel itself… encapsulation at its finest!
The machine class we create will contain 3 pointers. Each to one of the wheels. The machine itself will be in charge of a few different tasks. Taking money, issuing and removing credits, determining when to spin, telling each of the wheels to spin and checking our winnings based on some chart we create. It has enough on its plate than worrying about the wheels and reading their values.
So lets start with our Wheel class and its declaration/implementation…
wheel.h
As you can see the wheel itself is not a difficult concept to envision. The bulk of the work is in the read() method. Here we simply read the values from our internal array of integers (the values on the wheel) and return those values as an array of the three integers… representing the visible column. This column will then be loaded into our 2-Dimensional Array back in the Machine class. The 2D array represents the view or screen by which the user sees the results. Remember that the user never gets to see the entire wheel. Only the 3 consecutive values on the face of the wheel.
Here is how it may look in the real world. We have our machine with the three wheels and our 2D array called “Screen” which acts as our viewing window. Each wheel will report its values and those values will be put into the screen…
Below is our machine class…
machine.h
This looks like a lot of code but really it is not if you look at each function. Most of them are very very simple to understand. We have a spin method which essentially spins each of the wheels, reads their values back from the Wheel class into a pointer (representing each column), then they are loaded into the 2D array one column at a time (our view screen), printed for the user to see the results and lastly the winnings are checked. The checkwinnings() method determines which rows to check based on the amount of the bet. If they chose 1 line, it checks for winning combinations on the middle row only. If they choose 2 lines, it checks the middle and top lines, 3 line bet checks all three horizontal rows, 4 line bet checks the first diagonal as well and 5 line bet checks both diagonals in addition to the lines.
How does it check the lines? Well each line is given to the checkline() helper function which compares the 3 values of the line against an enumerated type of various symbols. Here we are just assigning a symbol against each numbered value to help the programmer determine which numbers correspond to which winning combos. For instance, luckyseven represents the number 3 in the enumeration. So if it runs across a line with 3 number 3s, then it knows it hit the grand jackpot and credits the player 1000. This method makes things easy because if we ever wanted to change the win patterns later, we could change the enum and checkline method to do so. We could also build in multiple types of symbols and even let the user choose what slot machine game they want to go by. It becomes very flexible and is a testament to great design!
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Lastly we can put some tests together just to show some the various aspects of how this thing works and how the programmer can use the classes…
slotmachine.cpp
This simply inserts a 5 dollar bill and a coin for good luck. Then bets 5 lines and spins. Despite the outcome we go and bet five lines again and spin once more. Hopefully we win something this time around! But either way, those are the classes for you and I hope you like them. As always, all code here on the Programming Underground is in the public domain and free for the taking (just don’t cause a mess in isle 3, I am tired of running out there for cleanup). Thanks for stopping by and reading my blog. 🙂
Free to Play Bally Slots Online
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The King of Pop Slot Review
There is no disputing that Michael Jackson reigned supreme as the King of Pop. Through his style, his music and his dancing, he single-handedly thrilled the world.
Bally Technologies has captured the spirit of the legendary superstar and put it into an equally mesmerizing Michael Jackson slot machine game.
By bringing Michael back to life with amazing graphics, they’ve truly brought a thrilling experience for even the most diehard fans of the late King.
Michael Jackson: Core Gameplay
Let’s start with the symbols, which won’t disappoint. The lower earning symbols: nine, 10, king, queen, jack and ace are all bedazzled as any Michael fan would expect.
However, the higher-paying symbols are even more spectacular. You’ll find a rhinestone-encrusted white glove, a black fedora hat, aviator sunglasses, and his famous jeweled socks tucked inside his black loafers, reminiscent of his Thriller days.
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If that isn’t enough, the Wild symbols, emblazoned with the word “wild” written in sparkling letters, can show up on any of the five reels, providing the second-biggest payout in the game, and can replace any symbol except for the scatters.
Those Wild symbols can appear as a Wild, a Double Wild Bonus, or even a Double Wild Jackpot. Your scatters offer the highest payouts and are a Bonus symbol with a picture of Michael from his Dangerous tour.
You will also find a Jackpot symbol with his eyes as they appeared on the cover of the Dangerous album.
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If you’re looking for a game that’s all things Michael, this is it.
Compare Game Features – Paylines – RTP
| Software | Bally |
| Reels | 5 |
| Paylines | 25 |
| Min. Bet | $0.50 |
| Max. Bet | $80 |
| Max. RTP | 96.01% |
| Max. Jackpot | 2,500 x Bet |
| Features | Wild, Scatter, Free Spins, Bonuses |
| Mobile App | Yes |
A Real Thriller of a Game
As soon as you sit down to play this game, the addiction begins. You’ll find yourself totally submerged in Michael and his world right from the get-go.
From the purple background to the crimson game board, this game will get you hooked. This five-reel, online slot game contains three rows, and 25 fixed playlines and is playable across all devices using a casino app — perfect for iPhone or Android.
While you might be tempted to just click on the jewel-encrusted spin symbol on the right-hand side of the screen, don’t do that right away. Instead, find the chevron symbol on the lower-left side of your screen to really learn how the game works.
Once you click on that, you’ll get a chance to change your bet to anything from 40 cents to $800 using the plus and minus symbols. As with any game, the higher your bet, the bigger the jackpot.
Clicking on the circle with the arrow symbol will allow you to set up autoplay for 10, 50, 100 or 200 spins. The down arrow will allow you to set the auto spins to stop when you’ve lost or won a set amount of money.
To the right of that, you’ll see a graph symbol, which leads you to the paytable and explains the winning combinations and payouts for the various symbols.
Features Based on Michael’s Greatest Hits
Once you’ve set yourself all up, go back to your main screen and experience Michael while you revel in five iconic songs from his musical heyday: Billie Jean, Bad, Dirty Diana, Smooth Criminaland Beat It.
Dirty Diana starts playing as soon as you start playing. Don’t stop spinning though. The second you stop, the music stops, encouraging you to keep going to hear the entire song.
If you want to hear the other songs included in the game, you’ve got to trigger a bonus, which is another great reason to keep on playing.
You might think the only thing missing is Michael dancing, that is until you randomly trigger Billie Jean.Michael spins and moonwalks his way across your screen as he leaves you some Moonwalk Wilds. The Moonwalk Wilds allow you to double the value of any wins you might receive. Every single moment of the Michael Jackson slot machine game provides you with an amazing MJ experience.
Moonwalk on the Bonus Side
When you hit a bonus, you’re in for a real treat. Two bonus symbols in the first three reels, or Stacked Wilds, causes reels four and five to spin independently and wildly.
A third bonus will lead you to the Platinum Bonus Spin, reminiscent of his many platinum albums. When you spin the wheel, you’ll have a chance to land on a dollar amount, or potential free games.
Landing on a dollar amount will trigger a win of your bet times the amount shown on the giant wheel.
If you land on the Bad free game, you’ll win 10 free games, and be treated with a short clip of the Bad music video. As you play your free games, Bad will keep playing as Michael appears to dance across the screen just for you as he points to Wild symbols almost as if he wants you to beat it.
Landing on the Smooth Criminal free game slot triggers five free games, to — you guessed it — Smooth Criminal, which will keep playing throughout your free games.
After your free games, the total amount you’ve won will appear on the screen with a picture of Michael’s spectacular posterior from his Dangerous World Tour.
As Michael dances across your screen with his microphone in hand, you’ll feel like cheering as if you were at an actual concert while you stare at the King in awe.
As you win, you’ll hear the roar of the crowd cheering, which will encourage you to keep on playing.
If you hit a Big Win or a Colossal Win, you’ll be delighted to see the golden Michael Jackson statue from the HIStory album as your screen appears to go up in flames.
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When it comes to the jackpot symbols, you need five in a row to win up to 2,500 times your total bet amount. While it may seem like a dangerous game to keep playing until you hit the jackpot, the payout is worth it in the end.
Final Thoughts
The Michael Jackson King of Pop casino slot game is a chance to experience Michael’s music in a whole new way, and win while you’re doing it.
Are you bad enough to play this game? Why not lose yourself in this wildly fun, interactive and immersive casino gaming experience.
Give it a go and beat it. This game is a real thriller, perfect for every Michael fan.