Thread: C Poker games

has anyone come accross any good poker games created in c which come with the code

mainly looking for texas holdem but any kind is okay im not fussy i just want to play one and see how it is coded.

What exactly are you having problems with? It shouldn't be that hard to make one. Are you trying to create the AI for one? Or do you just want one that deals out some cards to some players and they each take a turn, or what?

Code:

create a deck of 52 different cards
shuffle deck

for number of cards per hand
    for each player
        deal one card

for each round
    for each player
        switch round
            betting round:
                display amount to bet to stay in, if any
                ask amount to bet
                get bet
            card exchanging
                ask which cards to get rid of
                get rid of those cards
                deal that many new cards

calculate winner
give the bets to the winner

That looks like a fairly good start.

Quzah.

How about something like this?

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

char *cardname(int num)
{
  static char buf[10];
  char suits[] = "HCDS";
  char *cards[] = { " 2", " 3", " 4", " 5", " 6", " 7", " 8",
                    " 9", "10", " J", " Q", " K", " A"};

  sprintf(buf, "%s%c", cards[num%13], suits[num/13]);
  return buf;
}

char *cardval(int num)
{
  static char *cards[] = { "2", "3", "4", "5", "6", "7", "8",
                           "9", "10", "J", "Q", "K", "A"};

  return cards[num%13];
}

int is_x_of_a_kind(int *vals, int x, int *val, int except)
{
  int i, ctr;

  for(ctr = 0, *val = vals[0], i = 1;i < 5;++i)
  {
    if(vals[i] == except)
      continue;

    if(vals[i] == *val)
      ctr++;
    else
    {
      if(ctr == x-1)
        return 1;
      ctr = 0;
      *val = vals[i];
    }
  }

  return ctr == x-1;
}

int is_four_of_a_kind(int *vals, int *val)
{
  return is_x_of_a_kind(vals, 4, val, -1);
}

int is_three_of_a_kind(int *vals, int *val)
{
  return is_x_of_a_kind(vals, 3, val, -1);
}

int is_pair(int *vals, int *val)
{
  return is_x_of_a_kind(vals, 2, val, -1);
}

int is_two_pair(int *vals, int *val1, int *val2)
{
  if(!is_x_of_a_kind(vals, 2, val1, -1))
    return 0;
  if(!is_x_of_a_kind(vals, 2, val2, *val1))
    return 0;

  return 1;
}

int is_full_house(int *vals, int *val1, int *val2)
{
  return is_three_of_a_kind(vals, val1) && is_pair(vals, val2);
}

int is_flush(int *vals, int *suits, int *val)
{
  int i;

  for(i = 0;i < 4;++i)
    if(suits[i] != suits[i+1])
      return 0;

  *val = vals[4];

  return 1;
}

int is_straight(int *vals, int *val)
{
  int i;

  for(i = 0;i < 4;++i)
    if(vals[i]+1 != vals[i+1])
      return 0;

  *val = vals[4];

  return 1;
}

int is_straight_flush(int *vals, int *suits, int *val)
{
  return is_flush(vals, suits, val) && is_straight(vals, val);
}

void print_hand_rank(int *hand)
{
  int i, j, temp;
  int vals[5], suits[5];
  int highcard1, highcard2;

  for(i = 0;i < 5;++i)
  {
    vals[i] = hand[i]%13;
    suits[i] = hand[i]/13;
  }

  for(i = 0;i < 5;++i)
    for(j = i+1;j < 5;++j)
      if(vals[i] > vals[j])
      {
        temp = vals[i];
        vals[i] = vals[j];
        vals[j] = temp;
        temp = hand[i];
        hand[i] = hand[j];
        hand[j] = temp;
        temp = suits[i];
        suits[i] = suits[j];
        suits[j] = temp;
      }

  if(is_straight_flush(vals, suits, &highcard1))
    printf("Straight flush - %s high\n", cardval(highcard1));
  else if(is_four_of_a_kind(vals, &highcard1))
    printf("4 of a kind - %s high\n", cardval(highcard1));
  else if(is_full_house(vals, &highcard1, &highcard2))
  {
    char buf[5];

    strcpy(buf, cardval(highcard1));
    printf("Full house - %s's over %s's\n", buf, cardval(highcard2));
  }
  else if(is_flush(vals, suits, &highcard1))
    printf("Flush - %s high\n", cardval(highcard1));
  else if(is_straight(vals, &highcard1))
    printf("Straight - %s high\n", cardval(highcard1));
  else if(is_three_of_a_kind(vals, &highcard1))
    printf("3 of a kind - %s high\n", cardval(highcard1));
  else if(is_two_pair(vals, &highcard1, &highcard2))
  {
    char buf[5];

    strcpy(buf, cardval(highcard1));
    printf("2 pair - %s's and %s's\n", buf, cardval(highcard2));
  }
  else if(is_pair(vals, &highcard1))
    printf("Pair of %s's\n", cardval(highcard1));
  else
    printf("%s high\n", cardval(vals[4]));
}

int main(void)
{
  int deck[52], hand[5];
  int i, j, card, temp;

  srand(time(NULL));

  for(i = 0;i < 52;++i)
    deck[i] = i;

  for(i = 0;i < 10;++i)
    for(j = 0;j < 52;++j)
    {
      card = rand()%52;
      temp = deck[j];
      deck[j] = deck[card];
      deck[card] = temp;
    }

  for(i = 0;i < 5;++i)
    hand[i] = deck[i];

  for(i = 0;i < 5;++i)
    printf("%s ", cardname(hand[i]));
  putchar('\n');

  print_hand_rank(hand);

  return 0;

Seems to work anyway

Code:

itsme@itsme:~/C$ ./poker
 5S  4D  8S  AS  5H
Pair of 5's
itsme@itsme:~/C$ ./poker
 6C  7S  9D  JD 10H
J high
itsme@itsme:~/C$ ./poker
 JH  6S  5H  6D  JC
2 pair - 6's and J's

It just goes to show if you slack off long enough, someone will do everything for you.

Quzah.

Originally Posted by quzah

It just goes to show if you slack off long enough, someone will do everything for you.

Quzah.

Just the hand calculation part. And it's not quite good enough for comparing 2 hands absolutely, but it's improvable. No decision making or anything in this code.