tasks a-s

Task/Playing-cards/C/playing-cards.c

@@ -0,0 +1,94 @@
+#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";
+
+const char *s_suits_ascii[] = { "S", "H", "D", "C" };
+const 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;
+}