Poker Program

[DenJansen]

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:

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

#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

#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

#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;
}

[DenJansen]

/facepalm

Derp. I'm trying to output two values in a single function. Turned highcard into a pointer and now it works. Nevermind.