/*  Simulation of a craps game  */

#include <stdio.h>

#include <stdlib.h>

#include <ctype.h>



#define SEED 12345



void play(void);

int  ThrowDice(void);



void main(void)

{

	char answer = 'Y';



	printf("Welcome to the Game of CRAPS\n\n");

	printf("To throw the dice, press Enter\n\n");



	srand(SEED);  /* initialize the random number generator      */



	/* main loop */



	while (toupper(answer) != 'N') {

		play();

		printf("\nDo you want to play again ? (Y/N) ");

		scanf(" %c", &answer);

		printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");

	}

	printf("Bye, have a nice day");

}

/*-----------------------------------------------------------------*/

void play(void)

{

	int score1, score2;

	char dummy;



	printf("\nPlease throw the dice . . . ");

	scanf("%c",&dummy);

	printf("\n");

	score1 = ThrowDice();

	printf("\n%2d", score1);



	switch (score1) {

	case  7:			/* win on first throw                      */

	case 11:

		printf(" - Congratulations! You WIN on the first throw\n");

		break;

	case  2:			/* lose on first throw                     */

	case  3:

	case 12:

		printf(" - Sorry, you LOSE on the first throw\n");

		break;

	case  4:			/* additional throws are required          */

	case  5:

	case  6:

	case  8:

	case  9:

	case 10:

		do  {

			printf(" - Throw the dice again . . .");

			scanf("%c", &dummy);

			score2 = ThrowDice();

			printf("\n%2d", score2);

		} while (score2 != score1 && score2 != 7 );



		if (score2 == score1)

			printf(" - You WIN by matching your forst score\n");

		else

			printf(" - You LOSE by failing to match your first score\n");

		break;

	}

	return;

}

/*------------------------------------------------------------------------*/

int ThrowDice(void)               /* simulate one throw of a pair of dice */

{

	float x1, x2;        /* random floating-point numbers between 0 and 1 */

	int n1, n2;          /* random integers between 1 and 6               */



	x1 = rand() / 32768.0;

	x2 = rand() / 32768.0;



	n1 = 1 + (int) (6 * x1 );        /* simulate first die                 */

	n2 = 1 + (int) (6 * x2 );        /* simulate second die                */



	return (n1 + n2);               /* sum of two dice                    */

}

/*------------------------------------------------------------------------*/