Thread: Getting a random number

  1. #1
    Join Date
    Apr 2002

    Getting a random number

    Hi. I posted yesterday, but didn't get a good enough idea of how to proceed. I have four classes in a card game: Card, Deck, Player, and Game. The Card class is as follows:
    class Card
        void setValue(int);
        int getValue();
        int value;
    Class Deck should not have a private section, or any data members.
    class Deck
        Card randomCard;
        int shuffle();
    The code for the last two classes is:
    class Player
        void enterName();
        void setName(string);
        string getName();
        int getTotal();
        int addCardValue(Card);
        string name;
        int total;
    class Game
        void enterPlayerInfo();
        void playGame();
        Player getWinner();
        void showGame(Player);
        void drawPlayer();
        void drawDealers();
        Player user;
        Player computer;
    There are a few things that I am having difficulty with. As someone suggested yesterday (I haven't posted to forums such as these for a while), I try to ask one question at a time.

    I'm not sure how to get a new randomly drawn card to show up.
    I am given the following to put into the Main function:
    int main()
      srand( (unsigned)time( NULL ) ); 
      return 0;
    My shuffle() member function looks like this:
    int Deck::shuffle()
      return rand() % 10;
    Now, I am not sure where to go from here. I was thinking of trying to incorporate the accessor functions in Card, to set a new number each time. I'm puzzled though. Thanks in advance for any suggestions. Steve

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    > Class Deck should not have a private section, or any data members.
    Why not?
    I would think a deck would consist of 52 cards

    Shuffling the deck means something like
    swap( deck[i], deck[j] );
    a number of times

    And your Game class should consist of two Players and one Deck
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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  3. #3
    Registered User manofsteel972's Avatar
    Join Date
    Mar 2004

    From your previous post

    Your assignment instructions give you some pretty strange requirments.

    In your first post your assignment states that you only use cards 2 through 9, (pretty strange game of blackjack if you ask me) and that the shuffle is just the assignment of a random number well if you just get a random number between 0 and 7 you can add 2 to it to keep it in your range. but it is a requirement that you get a number between 0 and 9 oh well. just put in a comparision for if less then 2 get another number.

    from your assignment instructions
    // class Deck
    // Encapsulates a deck of cards.
    // Functionality (or Interface):
    // 1. Returns a randomly drawn Card object
    // 2. Shuffles the deck (for this assignment, this functionality
    // is defined as simply setting the random number generator)
    // Hint: Deck should not have a private section, or any data members.
    Last edited by manofsteel972; 04-12-2004 at 07:15 AM.
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  4. #4
    Been here, done that.
    Join Date
    May 2003
    Quote Originally Posted by smitsky
    Hi. I posted yesterday, but didn't get a good enough idea of how to proceed.
    Don't start a new thread for the same topic. It's permissable to replay to the same thread (and in fact is highly suggested)
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