Playing cards: Difference between revisions

<lang C>#include <stdio.h>

#include <stdlib.h>

#include <locale.h>

int locale_ok = 0;

wchar_t s_suits[] = L"♠♥♦♣";

/* if your file can't contain unicode, use the next line instead */

//wchar_t s_suits[] = L"\x2660\x2665\x2666\x2663";

char *s_suits_ascii[] = { "S", "H", "D", "C" };

char *s_nums[] = { "WHAT",

"A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K",

"OVERFLOW"

};

typedef struct { int suit, number, _s; } card_t, *card;

typedef struct { int n; card_t cards[52]; } deck_t, *deck;

void show_card(card c)

{

if (locale_ok)

printf(" %lc%s", s_suits[c->suit], s_nums[c->number]);

else

printf(" %s%s", s_suits_ascii[c->suit], s_nums[c->number]);

}

deck new_deck()

{

int i, j, k;

deck d = malloc(sizeof(deck_t));

d->n = 52;

for (i = k = 0; i < 4; i++)

for (j = 1; j <= 13; j++, k++) {

d->cards[k].suit = i;

d->cards[k].number = j;

}

return d;

}

void show_deck(deck d)

{

int i;

printf("%d cards:", d->n);

for (i = 0; i < d->n; i++)

show_card(d->cards + i);

printf("\n");

}

int cmp_card(const void *a, const void *b)

{

int x = ((card)a)->_s, y = ((card)b)->_s;

return x < y ? -1 : x > y;

}

card deal_card(deck d)

{

if (!d->n) return 0;

return d->cards + --d->n;

}

void shuffle_deck(deck d)

{

int i;

for (i = 0; i < d->n; i++)

d->cards[i]._s = rand();

qsort(d->cards, d->n, sizeof(card_t), cmp_card);

}

int main()

{

int i, j;

deck d = new_deck();

locale_ok = (0 != setlocale(LC_CTYPE, ""));

printf("New deck, "); show_deck(d);

printf("\nShuffle and deal to three players:\n");

shuffle_deck(d);

for (i = 0; i < 3; i++) {

for (j = 0; j < 5; j++)

show_card(deal_card(d));

printf("\n");

}

printf("Left in deck "); show_deck(d);

/* freeing the data struct requires just free(), but it depends on the

* situation: there might be cards dealt out somewhere, which is not

* in the scope of this task.

*/

//free(d);

return 0;

}</lang>output<lang>New deck, 52 cards: ♠A ♠2 ♠3 ♠4 ♠5 ♠6 ♠7 ♠8 ♠9 ♠10 ♠J ♠Q ♠K ♥A ♥2 ...

Shuffle and deal to three players:

♦3 ♦Q ♥2 ♣J ♣9

♥3 ♠5 ♣5 ♠A ♦6

♣8 ♥J ♠4 ♠3 ♣A

Left in deck 37 cards: ♥8 ♣10 ♣K ♦2 ♦A ♥10 ♥6 ♥Q ♠6 ♦4 ♥9 ♠9 ♣6 ♦K ♦8 ♠7 ♣7 ♠K ♠2 ♣4 ...</lang>

See also [[Playing Cards/C]]