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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4.  
  5. #define SUITS 4
  6. #define FACES 13
  7. #define CARDS 52
  8. #define HAND_SIZE 5
  9.  
  10. void shuffle(int deck[][FACES]);
  11.  
  12. void getCard(int deck[][FACES],
  13.              int cardNumber,
  14.              int card[]);
  15.  
  16. void printHand(int hand[][2],
  17.                const char *face[],
  18.                const char *suit[]);
  19.  
  20. int handValue(int hand[][2]);
  21.  
  22. int containsPair(int hand[][2]);
  23. int containsThreeOfKind(int hand[][2]);
  24. int containsFourOfKind(int hand[][2]);
  25. int containsFlush(int hand[][2]);
  26. int containsStraight(int hand[][2]);
  27.  
  28. void dealerDraw(int deck[][FACES],
  29.                 int hand[][2],
  30.                 int *nextCard);
  31.  
  32.  
  33. int main(void)
  34. {
  35.     int deck[SUITS][FACES] = { 0 };
  36.  
  37.     int playerHand[HAND_SIZE][2];
  38.     int dealerHand[HAND_SIZE][2];
  39.  
  40.     const char *suit[SUITS] =
  41.     { "Hearts", "Diamonds", "Clubs", "Spades" };
  42.  
  43.     const char *face[FACES] =
  44.     {
  45.         "Ace", "Deuce", "Three", "Four", "Five",
  46.         "Six", "Seven", "Eight", "Nine", "Ten",
  47.         "Jack", "Queen", "King"
  48.     };
  49.  
  50.     srand((unsigned int)time(NULL));
  51.  
  52.     shuffle(deck);
  53.  
  54.     for (int i = 0; i < HAND_SIZE; ++i)
  55.     {
  56.         getCard(deck, i + 1, playerHand[i]);
  57.     }
  58.  
  59.     for (int i = 0; i < HAND_SIZE; ++i)
  60.     {
  61.         getCard(deck,
  62.                 HAND_SIZE + i + 1,
  63.                 dealerHand[i]);
  64.     }
  65.  
  66.     printf("\nPlayer hand:\n");
  67.     printHand(playerHand, face, suit);
  68.  
  69.     printf("\nDealer hand before drawing:\n");
  70.     printHand(dealerHand, face, suit);
  71.  
  72.     int nextCard = 11;
  73.  
  74.     dealerDraw(deck, dealerHand, &nextCard);
  75.  
  76.     printf("\nDealer hand after drawing:\n");
  77.     printHand(dealerHand, face, suit);
  78.  
  79.     printf("\nPlayer hand value = %d\n",
  80.            handValue(playerHand));
  81.  
  82.     printf("Dealer hand value = %d\n",
  83.            handValue(dealerHand));
  84.  
  85.     if (handValue(playerHand) > handValue(dealerHand))
  86.     {
  87.         printf("\nPlayer wins.\n");
  88.     }
  89.     else if (handValue(dealerHand) > handValue(playerHand))
  90.     {
  91.         printf("\nDealer wins.\n");
  92.     }
  93.     else
  94.     {
  95.         printf("\nThe two hands are equal.\n");
  96.     }
  97.  
  98.     return 0;
  99. }
  100.  
  101.  
  102. void shuffle(int deck[][FACES])
  103. {
  104.     for (int card = 1; card <= CARDS; ++card)
  105.     {
  106.         int row;
  107.         int column;
  108.  
  109.         do
  110.         {
  111.             row = rand() % SUITS;
  112.             column = rand() % FACES;
  113.         }
  114.         while (deck[row][column] != 0);
  115.  
  116.         deck[row][column] = card;
  117.     }
  118. }
  119.  
  120.  
  121. void getCard(int deck[][FACES],
  122.              int cardNumber,
  123.              int card[])
  124. {
  125.     for (int row = 0; row < SUITS; ++row)
  126.     {
  127.         for (int column = 0; column < FACES; ++column)
  128.         {
  129.             if (deck[row][column] == cardNumber)
  130.             {
  131.                 card[0] = row;
  132.                 card[1] = column;
  133.  
  134.                 return;
  135.             }
  136.         }
  137.     }
  138. }
  139.  
  140.  
  141. void printHand(int hand[][2],
  142.                const char *face[],
  143.                const char *suit[])
  144. {
  145.     for (int i = 0; i < HAND_SIZE; ++i)
  146.     {
  147.         printf("%s of %s\n",
  148.                face[hand[i][1]],
  149.                suit[hand[i][0]]);
  150.     }
  151. }
  152.  
  153.  
  154. void dealerDraw(int deck[][FACES],
  155.                 int hand[][2],
  156.                 int *nextCard)
  157. {
  158.     int value = handValue(hand);
  159.  
  160.     if (value >= 3)
  161.     {
  162.         return;
  163.     }
  164.  
  165.     int keep[HAND_SIZE] = { 0 };
  166.  
  167.     if (containsFourOfKind(hand))
  168.     {
  169.         for (int i = 0; i < HAND_SIZE; ++i)
  170.         {
  171.             int count = 0;
  172.  
  173.             for (int j = 0; j < HAND_SIZE; ++j)
  174.             {
  175.                 if (hand[i][1] == hand[j][1])
  176.                 {
  177.                     ++count;
  178.                 }
  179.             }
  180.  
  181.             if (count == 4)
  182.             {
  183.                 keep[i] = 1;
  184.             }
  185.         }
  186.     }
  187.     else if (containsThreeOfKind(hand))
  188.     {
  189.         for (int i = 0; i < HAND_SIZE; ++i)
  190.         {
  191.             int count = 0;
  192.  
  193.             for (int j = 0; j < HAND_SIZE; ++j)
  194.             {
  195.                 if (hand[i][1] == hand[j][1])
  196.                 {
  197.                     ++count;
  198.                 }
  199.             }
  200.  
  201.             if (count == 3)
  202.             {
  203.                 keep[i] = 1;
  204.             }
  205.         }
  206.     }
  207.     else if (containsPair(hand))
  208.     {
  209.         for (int i = 0; i < HAND_SIZE; ++i)
  210.         {
  211.             int count = 0;
  212.  
  213.             for (int j = 0; j < HAND_SIZE; ++j)
  214.             {
  215.                 if (hand[i][1] == hand[j][1])
  216.                 {
  217.                     ++count;
  218.                 }
  219.             }
  220.  
  221.             if (count == 2)
  222.             {
  223.                 keep[i] = 1;
  224.             }
  225.         }
  226.     }
  227.  
  228.     for (int i = 0; i < HAND_SIZE; ++i)
  229.     {
  230.         if (keep[i] == 0)
  231.         {
  232.             getCard(deck, *nextCard, hand[i]);
  233.  
  234.             ++(*nextCard);
  235.         }
  236.     }
  237. }
  238.  
  239.  
  240. int containsPair(int hand[][2])
  241. {
  242.     for (int i = 0; i < HAND_SIZE; ++i)
  243.     {
  244.         for (int j = i + 1; j < HAND_SIZE; ++j)
  245.         {
  246.             if (hand[i][1] == hand[j][1])
  247.             {
  248.                 return 1;
  249.             }
  250.         }
  251.     }
  252.  
  253.     return 0;
  254. }
  255.  
  256.  
  257. int containsThreeOfKind(int hand[][2])
  258. {
  259.     for (int i = 0; i < HAND_SIZE; ++i)
  260.     {
  261.         int count = 0;
  262.  
  263.         for (int j = 0; j < HAND_SIZE; ++j)
  264.         {
  265.             if (hand[i][1] == hand[j][1])
  266.             {
  267.                 ++count;
  268.             }
  269.         }
  270.  
  271.         if (count == 3)
  272.         {
  273.             return 1;
  274.         }
  275.     }
  276.  
  277.     return 0;
  278. }
  279.  
  280.  
  281. int containsFourOfKind(int hand[][2])
  282. {
  283.     for (int i = 0; i < HAND_SIZE; ++i)
  284.     {
  285.         int count = 0;
  286.  
  287.         for (int j = 0; j < HAND_SIZE; ++j)
  288.         {
  289.             if (hand[i][1] == hand[j][1])
  290.             {
  291.                 ++count;
  292.             }
  293.         }
  294.  
  295.         if (count == 4)
  296.         {
  297.             return 1;
  298.         }
  299.     }
  300.  
  301.     return 0;
  302. }
  303.  
  304.  
  305. int containsFlush(int hand[][2])
  306. {
  307.     for (int i = 1; i < HAND_SIZE; ++i)
  308.     {
  309.         if (hand[i][0] != hand[0][0])
  310.         {
  311.             return 0;
  312.         }
  313.     }
  314.  
  315.     return 1;
  316. }
  317.  
  318.  
  319. int containsStraight(int hand[][2])
  320. {
  321.     int values[FACES] = { 0 };
  322.  
  323.     for (int i = 0; i < HAND_SIZE; ++i)
  324.     {
  325.         values[hand[i][1]] = 1;
  326.     }
  327.  
  328.     for (int start = 0; start <= 8; ++start)
  329.     {
  330.         int straight = 1;
  331.  
  332.         for (int i = 0; i < HAND_SIZE; ++i)
  333.         {
  334.             if (values[start + i] == 0)
  335.             {
  336.                 straight = 0;
  337.             }
  338.         }
  339.  
  340.         if (straight == 1)
  341.         {
  342.             return 1;
  343.         }
  344.     }
  345.  
  346.     if (values[0] == 1 &&
  347.         values[1] == 1 &&
  348.         values[2] == 1 &&
  349.         values[3] == 1 &&
  350.         values[4] == 1)
  351.     {
  352.         return 1;
  353.     }
  354.  
  355.     return 0;
  356. }
  357.  
  358.  
  359. int handValue(int hand[][2])
  360. {
  361.     if (containsFourOfKind(hand))
  362.     {
  363.         return 6;
  364.     }
  365.  
  366.     if (containsFlush(hand) &&
  367.         containsStraight(hand))
  368.     {
  369.         return 5;
  370.     }
  371.  
  372.     if (containsThreeOfKind(hand) &&
  373.         containsPair(hand))
  374.     {
  375.         return 4;
  376.     }
  377.  
  378.     if (containsFlush(hand) ||
  379.         containsStraight(hand))
  380.     {
  381.         return 3;
  382.     }
  383.  
  384.     if (containsThreeOfKind(hand))
  385.     {
  386.         return 2;
  387.     }
  388.  
  389.     if (containsPair(hand))
  390.     {
  391.         return 1;
  392.     }
  393.  
  394.     return 0;
  395. }
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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Player hand:
Ace of Clubs
Three of Spades
Three of Clubs
Queen of Hearts
Four of Clubs

Dealer hand before drawing:
Six of Clubs
Ace of Hearts
Jack of Diamonds
Nine of Hearts
Five of Diamonds

Dealer hand after drawing:
Eight of Diamonds
Queen of Spades
Nine of Spades
King of Spades
Deuce of Clubs

Player hand value = 1
Dealer hand value = 0

Player wins.
https://ideone.com/wmv1xy
language:
C (gcc 8.3)
created:
5 hours ago
visibility:
public

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