Chapter 10 - Project 3

[ShaunakRawat]

Issue in the solution for Project 3 of Chapter 10:

In the following code chunk from the solution, after reading a three-of-a-kind, the loop reads it again from the second card and sees a pair. The program thus detects a full house.

int matches = 0;
    for (int i = 0; i < NUM_CARDS; i++) {
        matches = 0;
        for (int j = i + 1; j < NUM_CARDS; j++) {
            if (hand[j][0] == hand[i][0])
                matches++;
        }

        if (matches == 1) pairs++;
        if (matches == 2) three = true;
        if (matches == 3) four = true;
    }

Here's a working solution. The following code chunk is from KNKing's online solutions for select exercises (http://knking.com/books/c2/answers/c10.html):

/* check for 4-of-a-kind, 3-of-a-kind, and pairs by
     looking for "runs" of cards with identical ranks */
  card = 0;
  while (card < NUM_CARDS) {
    rank = hand[card][RANK];
    run = 0;
    do {
      run++;
      card++;
    } while (card < NUM_CARDS && hand[card][RANK] == rank);
    switch (run) {
      case 2: pairs++;      break;
      case 3: three = true; break;
      case 4: four = true;  break;
    }
  }