🖐 Blackjack--A Real-World OOD Example

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Take a look at the Readme. So, we can create another object, albeit not a physical one, called Strategy that takes some input and gives advice on what move to make. Without implementing IList , we would probably have to write something like CurrentHand. Well, you could do that, but I felt the dealer and the players didn't have enough in common to justify it. The dealer also has a hand that has cards. When you inherit an interface, you must provide the implementation for all the methods of that interface. GetCard 0 , which isn't nearly as cool! This is a full-featured Blackjack game with strategies and graphics and even card counting. That may be the case in the real world, but this is an example of where the real world and OOD might better part ways. And there's a shoe from which the cards are dealt into the hands. Thanks for your registration, follow us on our social networks to keep up-to-date.{/INSERTKEYS}{/PARAGRAPH} How does the compiler know what CurrentHand[0] means? To use this kind of syntax, we must implement the IList interface. For our Blackjack game, we're going to have computer-controlled players as well as human ones. This allows us to use array syntax such as CurrentHand[0] , which really means nothing until we tell the compiler that this means the card is at position 0 in the array of cards in the hand. For that, we'll have to have a strategy that the computer players use. Going back to the design of the objects, you might be wondering why the Dealer and the Player objects don't inherit from some common object. Today This Week All-Time. There have been no articles posted today. This is the same interface used by the ArrayList class and others that you might be familiar with. Now there's a little more work to do. Players have hands that have cards. The shoe is easier to implement as an array of cards, though it must be a multiple of the number of cards in a deck Have fun with this game. Nice code, huh? There have been no articles posted this week. For IList , we need to add:. {PARAGRAPH}{INSERTKEYS}Click here for a larger image. Shouldn't the Shoe be composed of many Deck objects which are composed of many Card objects? A deck object would have just introduced an unneeded layer of complexity. The game Blackjack lends itself well to object-oriented design because it has physical objects that can be modeled in object-oriented code; for example, players, a dealer, cards, and so on. Well, that's because there is a lot of supporting code underneath this, particularly to implement the line:. Sometimes it's easier to envision the code you want to write and then model your objects to allow it. Notice that the players and the dealer are responsible for drawing their own hands. This is easily done by changing our class declaration slightly:. Let's take a look at a real-world example and a fun one as well. This makes it convenient to add code to the form's paint event like this:. These objects have relationships to one another, as well. But don't let it intimidate you. Now when we deal the cards, we just go around the table taking cards from the shoe object and adding them to the hand objects for each of the players and the dealer. It really just boils down to the few objects outlined above with a lot of fancy code added to make the game more appealing. The dealer can only have one hand, has no bank, no bet, no strategy, no card counting. Take a look at the code for this article. Desktop-as-a-Service Designed for Any Cloud? You might also wonder where the Deck object is. The Strategy object is going to belong to the Player objects and each player will need an array of Hand objects players can split pairs so they may have more than one hand. This will have to be a judgment call on your part and that's why they pay you the big bucks. Nutanix Frame.