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copied!<pre><code>#include <stdio.h> #include <stdlib.h> const int RANK = 0; const int SUIT = 1; const int NUM_SUITS = 4; const char STANDARD_SUITS[] = "dchs"; int usedSuits[] = {0, 0, 0, 0}; const char MOCK_SUITS[] = "ABCD"; const char BAD_SUIT = '*'; char pullSuit (int i) { if (usedSuits [i] > 0) { return BAD_SUIT; } ++usedSuits [i]; return STANDARD_SUITS [i]; } void unpullSuit (int i) { --usedSuits [i]; } int indexOfSuit (char suit, const char suits[]) { int i; for (i = 0; i < NUM_SUITS; ++i) { if (suit == suits [i]) { return i; } } return -1; } int legitimateSuits (const char suits[]) { return indexOfSuit (BAD_SUIT, suits) == -1; } int distinctSuits (const char suits[]) { int i, j; for (i = 0; i < NUM_SUITS; ++i) { for (j = 0; j < NUM_SUITS; ++j) { if (i != j && suits [i] == suits [j]) { return 0; } } } return 1; } void printCards (char* mockCards[], int numMockCards, const char realizedSuits[]) { int i; for (i = 0; i < numMockCards; ++i) { char* mockCard = mockCards [i]; char rank = mockCard [RANK]; char mockSuit = mockCard [SUIT]; int idx = indexOfSuit (mockSuit, MOCK_SUITS); char realizedSuit = realizedSuits [idx]; printf ("%c%c ", rank, realizedSuit); } printf ("\n"); } /* * Example usage: * char** mockCards = {"9A", "8A", "7B", "6B"}; * expand (mockCards, 4); */ void expand (char* mockCards[], int numMockCards) { int i, j, k, l; for (i = 0; i < NUM_SUITS; ++i) { char a = pullSuit (i); for (j = 0; j < NUM_SUITS; ++j) { char b = pullSuit (j); for (k = 0; k < NUM_SUITS; ++k) { char c = pullSuit (k); for (l = 0; l < NUM_SUITS; ++l) { char d = pullSuit (l); char realizedSuits[] = {a, b, c, d}; int legitimate = legitimateSuits (realizedSuits); if (legitimate) { int distinct = distinctSuits (realizedSuits); if (distinct) { printCards (mockCards, numMockCards, realizedSuits); } } unpullSuit (l); } unpullSuit (k); } unpullSuit (j); } unpullSuit (i); } } int main () { char* mockCards[] = {"9A", "8A", "7B", "6B"}; expand (mockCards, 4); return 0; } </code></pre>

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