3 replies to this topic

[thintheherd]

Hello, I have a program that randomly shuffles cards. Within the switch/case statements I am trying to display 'T' as "10". But I have tried several different ways to define T and it still will only print T instead of 10. A couple of things I have tried is a printf statement after T. I have tried to define T within the case statement, but nothing seems to work. When I try to compile the program with 10 within the ' ' for case (10), it gives me a multivariable error. Below id my code and I will note the place I would like to change the variable T to 10. The program compiles fine save for the T issue. Any help would be great! Thanks!

#include <stdio.h>

#include <stdlib.h>

#include <time.h>


#define DECK 52         //Cards in a deck

#define HEARTS 0x48    //Hearts in hex

#define DIAMONDS 0x44   //Diamond in hex

#define CLUBS 0x43    //Clubs in hex

#define SPADES 0x53     //Spade in hex


int draw_card(void);

void shuffle(void);

int rnd(int range);

void seedrnd(void);


/*

 * The cards array is stuck out here in no-man's land

 * to make it available to both the shuffle and

 * draw_card functions

 */


    int cards[DECK];    //Deck of Cards


int  main()

{

    int x=DECK;

    int card;

    char c,s;

    int T= 0xA;


    puts("After shuffling");


    shuffle();


/*

 * Sift through the entire deck, decrementing

 * variable x from 52 down to zero.

 */


    while(x--)

    {

        

        card = draw_card();

        switch((card % 13 ) + 1)

        {

            case(1):

                c = 'A';

                break;

            case(10):

                c = 'T' ;    /* I would like to display 10 here instead of T*/

                break;

            case(11):

                c = 'J';

                break;

            case(12):

                c = 'Q';

                break;

            case(13):

                c = 'K';

                break;

            default:

                c = (card % 13 )+'1';

        }


/*

 * The final printf displays the values

 */


        if(card>=0 && card<=13)

            s = HEARTS;

        else if(card>=14 && card<=26)

            s = DIAMONDS;

        else if(card>=27 && card<=40)

            s = CLUBS;

        else

            s = SPADES;


        printf("% c % c\t",c,s);



        if(!(x%4))

            putchar('\n');

    }

}


/*

 * The draw_card routine returns a random

 * number from 1 to 52 for each card in the deck

 */


int draw_card(void)

{

    int card;


    do

    {

        card=rnd(DECK); //draw card

    }

    while(cards[card]); //is card drawn?


    cards[card]=1;      //mark it as drawn


    return(card+1);     //make it 1 to 52

}


/*

 * The shuffle routine does two things:

 * It initializes the randomizer and

 * It initializes the cards[] array

 */


void shuffle(void)

{

    int x;


    seedrnd();


    for(x=0;x<DECK;x++)

        cards[x] = 0;

}


/* Generate a random value */


int rnd(int range)

{

	int r;


	r=rand()%range;		//spit up random num.

	return(r);

}


/* Seed the randomizer */


void seedrnd(void)

{

	srand((unsigned)time(NULL));

}

[Chris Weimer]

It's been a while since I messed around with anything, but you could always use another if statement for the printf function, where if c = A-I (i.e. 2 through 10) then it could print out not the char but a new int.

Just an idea, not sure how efficient it is.

[Warrior]

You can't display '10' by using a single character variable but you can set it to value 10 which is a newline character.
You either use a int variable or store it in a character array.

Warrior

[julmuri]

What the other guy said. (:
Maybe you want a function like:

char* cardstr( char* dst, int card )
{
    assert( 0 != dst );
    assert( 0 <= card && 51 >= card );

    static
    const char land[4]    = { 0x48, 0x44, 0x43, 0x53 };
    const int value       = ( card % 13 ) + 1;

    char* result = dst;
    *dst++ = land[13 <= card ? (int)card / 13 : 0];

    switch ( value )
    {
    case 1:
        strcpy( dst, "A\0" );
        break;

    case 11:
        strcpy( dst, "J\0" );
        break;

    case 12:
        strcpy( dst, "Q\0" );
        break;

    case 13:
        strcpy( dst, "K\0" );
        break;

    default:
        itoa( value, dst, 10 );
        break;

    } // switch

    return result;
}

int main( int argc, char* argv[] )
{
    char str[4] = {0};

    for ( int i = 51; 0 <= i; --i )
        printf( "%s\n", cardstr( str, i ));
        
    return 0;
}