Sevens

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
typedef struct {
  int suit;
  int number;
  char *display;
} card_t;
static const int suit = 4;
static const int number = 13;
static void shuffle(card_t **cards);
static card_t **init(const char **suits, const char **numbers);
static int input_number(int lower, int upper);
static int ask_players(void);
static card_t ***deal_to(card_t **cards, int player);
static void compact_one_card(card_t **some_player, int player);
static void first_play_seven(card_t ***players, int player);
static int count_card(card_t **some_player, int player);
static int **init_open(void);
static void puts_open_card(int **open, const char **suits, const char **numbers);
static int win(card_t **some_player, int player);
static void win_first_hand(card_t ***players, int player);
static void puts_hand(int no, card_t **some_player, int player);
static int can_put(card_t *card, int **open);
static int pass_or_not(card_t **some_player, int player, int **open);
static void play(card_t **some_player, int in, int player, int **open);
static void choice(int no, card_t **some_player, int player, int **open);
static void shuffle(card_t **cards) {
  int i, j;
  card_t *p;
  srand((unsigned) time(NULL));
  for (i = suit * number - 1; i > 0; i--) {
    j = (int) (rand() / ((double) (RAND_MAX) + 1.) * (i + 1));
    p = cards[i];
    cards[i] = cards[j];
    cards[j] = p;
  }
}
static card_t **init(const char **suits, const char **numbers) {
  int i, j, k;
  card_t **cards = (card_t **) malloc(suit * number * sizeof(card_t *));
  for (i = 0; i < suit; i++) {
    for (j = 0; j < number; j++) {
      k = i * number + j;
      cards[k] = (card_t *) malloc(sizeof(card_t));
      cards[k]->suit = i;
      cards[k]->number = j;
      cards[k]->display = (char *) malloc((strlen(suits[i]) + 2 + 1) * sizeof(char));
      sprintf(cards[k]->display, "%s%s", suits[i], numbers[j]);
    }
  }
  shuffle(cards);
  return cards;
}
static int input_number(int lower, int upper) {
  char in[BUFSIZ];
  int i, ret;
  while (1) {
    printf("(%d - %d): ", lower, upper);
    fgets(in, BUFSIZ, stdin);
    in[strlen(in) - 1] = '\0';
    for (i = 0; i < strlen(in); i++)
      if (!isdigit(in[i])) goto clear;
    ret = atoi(in);
    if (ret < lower || upper < ret) goto clear;
    break;
    clear: ;
  }
  return ret;
}
static int ask_players(void) {
  printf("Players? ");
  return input_number(1, 52);
}
static card_t ***deal_to(card_t **cards, int player) {
  int i, j;
  card_t ***players = (card_t ***) malloc(player * sizeof(card_t **));
  for (i = 0; i < player; i++) {
    players[i] = (card_t **) malloc((suit * number / player + 1) * sizeof(card_t *));
    for (j = 0; j < suit * number / player + 1; j++) {
      players[i][j] = NULL;
    }
  }
  for (i = 0, j = 0; i < suit * number; i++, j++) {
    players[j % player][i / player] = cards[i];
  }
  return players;
}
static void compact_one_card(card_t **some_player, int player) {
  int i;
  for (i = 0; i < suit * number / player; i++) {
    if (some_player[i]) continue;
    some_player[i] = some_player[i + 1];
    some_player[i + 1] = NULL;
  }
}
static void first_play_seven(card_t ***players, int player) {
  int i, j;
  for (i = 0; i < player; i++) {
    for (j = 0; j < suit * number / player + 1; j++) {
      if (!players[i][j]) break;
      if (players[i][j]->number == 7 - 1) {
        players[i][j] = NULL;
        compact_one_card(players[i], player);
        j--;
      }
    }
  }
}
static int count_card(card_t **some_player, int player) {
  int i, c = 0;
  for (i = 0; i < suit * number / player + 1; i++) {
    if (!some_player[i]) break;
    c++;
  }
  return c;
}
static int **init_open(void) {
  int i, j;
  int **open = (int **) malloc(suit * sizeof(int *));
  for (i = 0; i < suit; i++) {
    open[i] = (int *) malloc(number * sizeof(int));
    for (j = 0; j < number; j++) {
      if (j != 7 - 1) {
        open[i][j] = 0;
        continue;
      }
      open[i][j] = 1;
    }
  }
  return open;
}
static void puts_open_card(int **open, const char **suits, const char **numbers) {
  int i, j;
  printf("   ");
  for (i = 0; i < number; i++) {
    if (i != 9) printf(" ");
    printf("%s", numbers[i]);
  }
  puts("");
  for (i = 0; i < suit; i++) {
    printf("%s ", suits[i]);
    for (j = 0; j < number; j++) {
      if (open[i][j] == 0)
        printf(" .");
      else
        printf(" #");
    }
    puts("");
  }
}
static int win(card_t **some_player, int player) {
  return count_card(some_player, player) == 0;
}
static void win_first_hand(card_t ***players, int player) {
  int i;
  for (i = 0; i < player; i++) {
    if (win(players[i], player)) {
      printf("Player %d win, becouse all hands are 7.\n", i);
      exit(0);
    }
  }
}
static void puts_hand(int no, card_t **some_player, int player) {
  int i, c;
  printf("Player %d: ", no);
  c = count_card(some_player, player);
  for (i = 0; i < c; i++) {
    printf("%d:[%s]", i, some_player[i]->display);
    if (i < c - 1) printf(", ");
  }
  printf("  ");
}
static int can_put(card_t *card, int **open) {
  int suit = card->suit, number = card->number;
  if (number == 1 - 1)
    return open[suit][2 - 1] == 1;
  else if (number == 13 - 1)
    return open[suit][12 - 1] == 1;
  else
    return open[suit][number - 1] == 1 || open[suit][number + 1] == 1;
}
static int pass_or_not(card_t **some_player, int player, int **open) {
  int i, c, ret = 0;
  c = count_card(some_player, player);
  for (i = 0; i < c; i++)
    ret = ret || can_put(some_player[i], open);
  return ret;
}
static void play(card_t **some_player, int in, int player, int **open) {
  card_t *card = some_player[in];
  open[card->suit][card->number] = 1;
  some_player[in] = NULL;
  compact_one_card(some_player, player);
}
static void choice(int no, card_t **some_player, int player, int **open) {
  int c, in;
  puts_hand(no, some_player, player);
  if (!pass_or_not(some_player, player, open)) {
    puts("pass");
    return;
  }
  c = count_card(some_player, player);
  do {
    in = input_number(0, c - 1);
  } while (!can_put(some_player[in], open));
  play(some_player, in, player, open);
}
int main(void) {
  int i;
  int player;
  card_t **cards;
  card_t ***players;
  int **open;
  const char *suits[] = { "♠", "♥", "♦", "♣" };
  const char *numbers[] = { "A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K" };
  cards = init(suits, numbers);
  player = ask_players();
  players = deal_to(cards, player);
  first_play_seven(players, player);
  if (suit * number / player <= 4) {
    win_first_hand(players, player);
  }
  open = init_open();
  do {
    for (i = 0; i < player; i++) {
      puts_open_card(open, suits, numbers);
      choice(i, players[i], player, open);
      if (win(players[i], player)) goto over;
    }
    continue;
    over: printf("Player %d win.\n", i);
    break;
  } while (1);
  return 0;
}