craps.c

/* craps.c - the casino dice game */
/* Michael J. Chappell */

#define VERSION      "0.3 6 Oct 2024"
#define VERSION_YEAR 2024

#if defined(__linux__)
#define sranddev() srand((unsigned int)time(NULL))
#endif

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

#include "screen.h"
#include "craps.h"
#include "getbank.h"
#include "getbet.h"

int matrix[7][3][3] = {
    { { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
    { { 0, 0, 0 }, { 0, 1, 0 }, { 0, 0, 0 } },
    { { 0, 0, 1 }, { 0, 0, 0 }, { 1, 0, 0 } },
    { { 0, 0, 1 }, { 0, 1, 0 }, { 1, 0, 0 } },
    { { 1, 0, 1 }, { 0, 0, 0 }, { 1, 0, 1 } },
    { { 1, 0, 1 }, { 0, 1, 0 }, { 1, 0, 1 } },
    { { 1, 0, 1 }, { 1, 0, 1 }, { 1, 0, 1 } }
};

int die[2] = { 0, 0 };
    
int printDieLine(int roll, int line) {
    int i, j;

    switch (line) {
        case 0:
            fputs(TOPLINE, stdout);
            break;
        case 1:
        case 2:
        case 3:
            fputs(LEDGE, stdout);
            for (i=0; i<3; i++)
	      fputs(matrix[roll][line-1][i] ? FILL : EMPTY, stdout);
            fputs(REDGE, stdout);
            break;
        case 4:
            fputs(BOTTOMLINE, stdout);
            break;
        case 5:
            fprintf(stdout, "     %d    ", roll);
            break;
        }
    return EXIT_SUCCESS;
}

int version(char *command, char *versionstring, int year) {
    printf("%s %s", command, versionstring);
    printf("\nCopyright %d Michael J. Chappell\n", year);
    
    return EXIT_SUCCESS;
}

/* printDice - prints out dice
   number is the number of dice.
   die is an array integers reprsenting rolls.
   verifies each roll is 1<=roll<=6.
   returns the number of dice printed.
*/
int printDice(int number, int *die) {
  int line;
  int i;

  /* Are rolls valid? */
  for (i=0; i<number; i++) {
    if (die[i]<1) return 0;
    if (die[i]>6) return 0;
  }
  
  for (line=0; line<6; line++) {
    putc('\n', stdout);
    for (i=0; i<number; i++)
      printDieLine(die[i], line);
  }

  return number;
}

int main(int argc, char **argv) {
    int line=0;
    int roll=0;
    int bank=0;
    int i=0;
    int toss=0;
    int point=0;
    int total=0;
    int kitty=0;
    int bet=0;

    die[0]=4;
    die[1]=3;
    

    bank = getBank(argc, argv);

    /* handle errors */
    switch (bank) {
    case CRAPS_ERR_HELP:
      printf("%s\n", argv[0]);
      printf("\n"
	     "Usage:\n");
      printf("\t%s [-][n]\n", argv[0]);
      printf("\t%s [-h][-v]\n", argv[0]);
      printf("\n"
	     "n is your initial bank roll and should be in the range of 5\n"
	     "to %d.  The default bank roll is %d.\n", MAX_BANK_ROLL,
	     DEFAULT_BANK_ROLL);
      printf("\n"
	     "A negative value will not seed the random number generator.\n"
	     "\n"
	     "-h\tHelp\n"
	     "-v\tVersion\n"
	     "\n"
	     "Copyright %d Michael J. Chappell\n", VERSION_YEAR);
      
      return EXIT_SUCCESS;
      break;
    case CRAPS_ERR_PARAM:
      printf("Bad argument!\n"
	     "\n"
	     "Valid arguments are integers 5 to %d, -h or -v.\n",
	     MAX_BANK_ROLL);
      printf("Negating the integer will skip seeding the random number\n"
	     "generator.\n");
      return EXIT_FAILURE;
      break;
    case CRAPS_ERR_RANGE:
      printf("n is out of range!\n"
	     "\n"
	     "n is your initial bank roll and should be in the range of 5\n");
      printf("to %d.  The default bank roll is %d.\n", MAX_BANK_ROLL,
	     DEFAULT_BANK_ROLL);
      printf("A negative value will not seed the random number generator.\n"
	     "\n");
      return EXIT_FAILURE;
      break;
    case CRAPS_ERR_VERSION:
      version(argv[0],VERSION, VERSION_YEAR);
      return EXIT_SUCCESS;
      break;
    }
    
    /* If bank is positive seed rand, otherwise skip, make n positive */
    if (bank>0) {
      sranddev();
    } else {
      bank=bank*-1;
    }

    for (roll=1; ;) {
      if ((bank<1)&&(roll==1)) {
	printf("You ran out of money.\n"
	       "\n"
	       "Come again soon!\n");
	break;
      }
      if (roll==1) {
	kitty = 0;
	point = 0;
      }
      screen_clear();
      printf("  ____ ____      _    ____  ____\n"
	     " / ___|  _ \\    / \\  |  _ \\/ ___|\n"
	     "| |   | |_) |  / _ \\ | |_) \\___ \\\n" 
	     "| |___|  _ <  / ___ \\|  __/ ___) |\n"
	     " \\____|_| \\_\\/_/   \\_\\_|   |____/\n" 
	     "\n");
      printf("Bank: $%6d  Pot: $%6d\n",
	     bank, kitty);
      printf("Roll: %d\n\n", roll);
      bet = getBet(roll, point, kitty, bank, CRAPS_MAX_BET);
      if (bet==-2) break;
      bank = bank-bet;
      kitty = kitty+bet;
      
      die[0] = rand()%6+1;
      die[1] = rand()%6+1;
      printDice(2, die);
      printf("\n\n");
      total = die[0]+die[1];
      if (roll==1) {
	switch(total) {
	case 2:
	case 3:
	  printf("Craps!  You lose.\n");
	  kitty = 0;
	  break;
	case 7:
	  printf("Natural!  Winner!\n");
	  bank = bank+2*kitty;
	  kitty = 0;
	  break;
	case 11:
	  printf("Natural!  Winner!\n");
	  bank = bank+2*kitty;
	  kitty = 0;
	  break;
	case 12:
	  printf("Craps! You lose.\n");
	  kitty = 0;
	  break;
	case 4:
	case 5:
	case 6:
	case 8:
	case 9:
	case 10:
	  printf("Your point is %d.\n", total);
	  point = total;
	  roll++;
	  break;
	}
      } else {
	if (total==point) {
	  printf("Point made.\n");
	  if (die[0]==die[1])
	    printf("The hard way!\n");
	  printf("Winner!\n");
	  bank = bank+2*kitty;
	  roll = 1;
	} else if (total==7) {
	  printf("Craps!  You loose!\n");
	  roll = 1;
	} else {
	  roll++;
	}
      }
      /* Eat the carriage return left by scanf */
      while (fgetc(stdin)!='\n') ;
      
      printf("\nPress <Enter> or <Return> to Continue..");
      while (fgetc(stdin)!='\n') ;
      printf("\n");
    }
    
    return EXIT_SUCCESS;
}
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Wednesday, 12 August 2026 Michael J. Chappell Contact me at: mcsuper5@freeshell.org
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