Poker Program

This one is really vexing me. I'm writing a rudimentary poker program, and I created this function that, as far as I can tell, should work. It's designed to evaluate a 2x5 array called wHand--where row 0 represents the suit and row 1 represents the face value--and determine if there's a pair:

Code:

void pair (int wHand[][5], int eval, int highcard) { int column1 = 0; int column2 = 0; for (column1 = 0; column1 <=3; column1++) { for (column2 = column1+1; column2 <=4; column2++) { if (wHand[1][column1] == wHand[1][column2]) /*pair*/ { eval = 2; /*pair*/ highcard = wHand[1][column1]; } } } }

The thing is, when I run it, even if the hand has a pair, eval and highcard don't change from their default value of zero. What am I doing wrong?

Full code (one header, two source files):
poker.h

Code:

#ifndef POKER_H #define POKER_H #include <stdio.h> #include <stdlib.h> #include <time.h> void shuffle (int wDeck[][13]); void deal (const int wDeck[][13], const char *wFace[], const char *wSuit[], int wHand[][5], int *dealtp, int *player); void pair (int wHand[][5], int eval, int highcard); /*void twopair (wHand[][5], int eval, int highcard); void threekind (wHand[][5], int eval, int highcard); void straight (wHand[][5], int eval, int highcard); void flush (wHand[][5], int eval, int highcard); void fourkind (wHand[][5], int eval, int highcard);*/ #endif

poker.c

Code:

#include "poker.h" /* shuffle cards in deck */ void shuffle (int wDeck[][13]) { int row = 0; /* row number */ int column = 0; /*column number */ int card = 0; /* card counter */ int eval1 = 0; int evalAI = 0; /* for each of the 52 cards, choose slot of deck randomly */ for (card = 1; card <= 52; card++) { /* choose new random location until unoccupied slot found */ do { row = rand () % 4; column = rand () % 13; } while (wDeck[row][column] != 0); /* place card number in chosen slot of deck */ wDeck[row][column] = card; } } /* deal cards in deck */ void deal (const int wDeck[][13], const char *wFace[], const char *wSuit[], int wHand[][5], int *dealtp, int *player) { int row = 0; /* row number */ int column = 0; /*column number */ int card = 0; /* card counter */ /* deal 5 cards */ for (card = 1; card <= 5; card++) { *dealtp = *dealtp + 1; /* loop through rows of wDeck */ for (row = 0; row <= 3; row++) { /* loop through columns of wDeck for current row */ for (column = 0; column <= 13; column++) { /* if slot contains current card, display card */ if (wDeck[row][column] == *dealtp) { if (*player==1) { printf ("%5s of %-8s%c", wFace[column], wSuit[row], card % 2 == 0 ? '\n' : '\t'); } wHand[0][card - 1] = row; wHand[1][card - 1] = column; } } } } } void pair (int wHand[][5], int eval, int highcard) { int column1 = 0; int column2 = 0; for (column1 = 0; column1 <=3; column1++) { for (column2 = column1+1; column2 <=4; column2++) { if (wHand[1][column1] == wHand[1][column2]) /*pair*/ { eval = 2; /*pair*/ highcard = wHand[1][column1]; } } } }

main.c

Code:

#include "poker.h" int main (void) { /* initialize suit array */ const char *suit[4] = {"Hearts", "Diamonds", "Clubs", "Spades"}; /* initialize face array */ const char *face[13] = {"Ace", "Deuce", "Three", "Four", "Five", "Size", "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King"}; /* initalize deck array */ int deck[4][13] = {0}; int handP1[2][5] = {0}; int handAI[2][5] = {0}; int player = 0; int dealt = 0; int evalP1 = 0; int evalAI = 0; int highP1 = 0; int highAI = 0; srand ((unsigned) time (NULL)); /* see random-number generator */ shuffle (deck); player = 1; deal (deck, face, suit, handP1, &dealt, &player); player = 2; deal (deck, face, suit, handAI, &dealt, &player); pair (handP1, evalP1, highP1); return 0; }