// Card shuffling and dealing.
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define SUITS 4
#define FACES 13
#define CARDS 52
// prototypes
void shuffle( unsigned int wDeck[][ FACES ] ); // shuffling modifies wDeck
void deal( unsigned int wDeck[][ FACES ], const char *wFace[],
const char *wSuit[] ); // dealing doesn't modify the arrays
int main( void )
{
// initialize suit array
const char *suit[ SUITS ] =
{ "Hearts", "Diamonds", "Clubs", "Spades" };
// initialize face array
const char *face[ FACES ] =
{ "Ace", "Deuce", "Three", "Four",
"Five", "Six", "Seven", "Eight",
"Nine", "Ten", "Jack", "Queen", "King" };
// initialize deck array
unsigned int deck[ SUITS ][ FACES ] = { 0 };
srand( time( NULL ) ); // seed random-number generator
shuffle( deck ); // shuffle the deck
deal( deck, face, suit ); // deal the deck
} // end main
// shuffle cards in deck
void shuffle( unsigned int wDeck[][ FACES ] )
{
size_t row; // row number
size_t column; // column number
size_t card; // counter
// for each of the cards, choose slot of deck randomly
for ( card = 1; card <= CARDS; ++card ) {
// choose new random location until unoccupied slot found
do {
row = rand() % SUITS;
column = rand() % FACES;
} while( wDeck[ row ][ column ] != 0 ); // end do...while
// place card number in chosen slot of deck
wDeck[ row ][ column ] = card;
} // end for
} // end function shuffle
// deal cards in deck
void deal( unsigned int wDeck[][ FACES ], const char *wFace[],
const char *wSuit[] )
{
size_t card; // card counter
size_t row; // row counter
size_t column; // column counter
// deal each of the cards
for ( card = 1; card <= CARDS; ++card ) {
// loop through rows of wDeck
for ( row = 0; row < SUITS; ++row ) {
// loop through columns of wDeck for current row
for ( column = 0; column < FACES; ++column ) {
// if slot contains current card, display card
if ( wDeck[ row ][ column ] == card ) {
printf( "%5s of %-8s%c", wFace[ column ], wSuit[ row ],
card % 2 == 0 ? '\n' : '\t' ); // 2-column format
} // end if
} // end for
} // end for
} // end for
} // end function deal
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