/* hurkle.c - Mr. Len Meakin - 24.11.2000. */

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>

#define MAX	10
#define TRUE    1
#define FALSE	0

int main (void)
{
	int hur_x 		= 0,
		hur_y 		= 0,
		x	 		= 0,
		y 			= 0,
		tries 		= 0,
		ret_val 	= 0,
		got_hurkle 	= FALSE;
	char 	another = 'N';

	/*Use the time and srand functions in order to generate better random numbers*/
	srand(time(NULL));

	printf("\n *** Welcome to Find the Hurkle ***\n");
	printf("\n The Hurkle is hiding within a grid of 10 by 10.\n");
	printf("       x = left -> right, y = down -> up\n");
	printf("       x =   1  ->   10 , y =   1  -> 10\n");

	printf("\n Enter your guess in the following format -\n");
	printf(" x y (x and y must be whole numbers in the range 1 <-> 10\n");

	do
	{	/*Re-initialise important variables*/
		tries = hur_x = hur_y = 0;

		/*Generate the co-ordinates for the Hurkle to hide. */
		/*make sure we get a value between 1 and 10 */
		hur_x = (rand() % 9) + 1;
		hur_y = (rand() % 9) + 1;

		while (tries < MAX)
		{	while (ret_val != 2)
			{	printf("\n Please enter guess number %d (x y) - ", (tries++)+1);
				scanf("%d %d", &x, &y);
			}

			/*Check for incorrect input being entered*/
			if (x < 1 || x > 10 || y < 1 || y > 10)
			{	printf(" **INCORRECT INPUT** Please try again.");
				tries--;
				continue;
			}

			/*Get out of the loop if they have found the Hurkle*/
			if (x == hur_x && y == hur_y)
			{	got_hurkle = TRUE;
				break;
			}

			/*Tell user where to try next time*/
			if (hur_x < x)
				printf(" *LEFT* ");
			else if (hur_x > x)
				printf(" *RIGHT* ");

			if (hur_y < y)
				printf(" *DOWN* ");
			else if (hur_y > y)
				printf(" *UP* ");
		}

		if (got_hurkle)
			printf("\n Hit - you found it !\n");
		else
			printf("\n Bad Luck - you missed\n");

		/*Continue with another game?*/
		printf("\n Care for another game? (Y/N) - ");
		another = toupper(getche());

	}while (another == 'Y');

	printf("\n Goodbye!\n");
	return EXIT_SUCCESS;
}