Accessing Structure Members

This is a discussion on Accessing Structure Members within the C Programming forums, part of the General Programming Boards category; I am currently working on a client/server poker program. This file I have pulled separate for the time being while ...

  1. #1
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    Accessing Structure Members

    I am currently working on a client/server poker program. This file I have pulled separate for the time being while I play around with it and try to get it to work. This code is made to form the deck of cards, shuffle and print a hand. What I need to do however is use these cards later for comparison, etc. for the actual poker game. Is there a way to access individual cards here so that I may do that? Or is there a way to store individual structure elements into an array? I have been modifying this code now for hours trying to figure it out, unfortunately something is slipping by me I guess. Thanks for any help anyone can provide.

    Code:
    #include <stdio.h>
    #include <stdlib.h>
    #include <time.h>
    
    typedef struct card { 
    	const char *face; 
    	const char *suit; 
    }Card; 
    
    /* typedef struct card Card; */ 
    
    typedef struct {
    	Card myCards[52];
    	unsigned int topCard;
    } Deck;
    
    void fillDeck( Card * const, const char*[], const char*[] ); 
    void shuffle( Card * const ); 
    
    void initDeck (Deck * const initMe, const char *face[], const char * suit[]);
    void Deal(Deck * const dealMe); 
    
    char const * getFace (Deck const * const getMyFace);
    char const * getSuit (Deck const * const getMySuit);
    
    int main() 
    { 
    	const char *face[] = { "Ace", "Two", "Three", "Four", 
    		"Five", "Six", "Seven", "Eight", 
    		"Nine", "Ten", "Jack", "Queen", "King"}; 
    	const char *suit[] = {"Diamonds", "Hearts", "Clubs", "Spades" }; 
    	
    	
    	Deck myDeck;
    	
    	srand(time(NULL ) ); 
    	
    	initDeck (&myDeck, face, suit);
    	Deal(&myDeck); 
    	
    	return 0; 
    } 
    
    void initDeck (Deck * const initMe, const char * face[], const char * suit[])
    {
    	initMe -> topCard = 0;
    	
    	fillDeck (initMe -> myCards, face, suit);
    	shuffle (initMe -> myCards);
    	
    	return;
    }
    
    void fillDeck( Card * const wDeck, const char * wFace[], const char * wSuit[]) 
    { 
    	int i; 
    	
    	for( i = 0; i <= 51; i++) { 
    		wDeck[ i ].face = wFace[ i % 13 ]; 
    		wDeck[ i ].suit = wSuit[ i / 13 ]; 
    	} 
    } 
    
    void shuffle( Card * const wDeck ) 
    { 
    	int i, j; 
    	Card temp; 
    	
    	for ( i = 0; i<= 51; i++ ) { 
    		j = rand() % 52; 
    		temp =wDeck[ i ]; 
    		wDeck[ i ] = wDeck[ j ]; 
    		wDeck[ j ] = temp; 
    	} 
    } 
    
    // Takes the top card off the deck and prints it
    void Deal(Deck * const dealMe) 
    { 
    	int i = 0;
    	
    	do {
    	printf ("%5s of %-8s\n", getFace (dealMe), getSuit (dealMe));
    	dealMe -> topCard++;
    		i++;
    	} while (i < 6);
    
    	
    	return;
    }
    
    char const * getFace (Deck const * const getMyFace)
    {
    	return getMyFace->myCards[getMyFace->topCard].face;
    }
    
    char const * getSuit (Deck const * const getMySuit)
    {
    	return getMySuit->myCards[getMySuit->topCard].suit;
    }

  2. #2
    ATH0 quzah's Avatar
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    Just give your cards a value from 1 to 52. Divide that value by 13 to get the suit, and mod that value by 13 to get the face.


    Quzah.
    Hope is the first step on the road to disappointment.

  3. #3
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    Sure, I understand that. The code will perform that task, it will print out cards. What I want to do is either know a way to access these cards inside the struct, so that I can use them on command, or know how to stick these cards into an array. I know how to use arrays, but unsure how to put something in an array that is in a struct. Bottom line is I will need to use this to compare cards to see what your hand has, and if you win anything.

  4. #4
    ATH0 quzah's Avatar
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    Code:
    struct hand
    {
        char cards[5];
    };
    struct hand mine;
    ...
    if( mine.cards[ 0 ] == something )
    ...
    I'm not really sure what you're asking/having problems with.


    Quzah.
    Hope is the first step on the road to disappointment.

  5. #5
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    Ok, so for example in my code, I have

    Code:
    typedef struct card { 
    	const char *face; 
    	const char *suit; 
    }Card;
    and then I have

    Code:
    typedef struct {
    	Card myCards[52];
    	unsigned int topCard;
    } Deck;
    In my main then I declare

    Code:
    Deck myDeck;
    Following your explanation, I could do

    Code:
    if (myDeck.myCards[0] == something)
    ...
    Is that correct?
    Last edited by anndruu12; 12-01-2010 at 08:31 PM. Reason: Paren fix.

  6. #6
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    No, because myDeck.myCards[0] is of type struct.
    You can't compare struct with == operator.

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