/* Graphics Simulation Program */

#include <graphics.h>
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
#include <limits.h>

int main ()
{
	clrscr ();
	int gdriver = DETECT, gmode, errorcode;
	initgraph (&gdriver, &gmode, "g:\\bgi");
	errorcode = graphresult ();

	if (errorcode != grOk)
		{
		printf ("Graphics error: %s \n", grapherrormsg (errorcode));
		printf ("Press Anykey to halt: ");
		getch ();
		exit (1);
		}

	/* "graphics main prorgam lines" go here */

	int x, y, xmax, ymax;
	unsigned color;

	xmax = getmaxx();
	ymax = getmaxy();
	randomize ();

	while (!kbhit())
		{
		x = random (xmax);
		y = random (ymax);
		color = random (getmaxcolor () );

		setcolor(color);
		setfillstyle(HATCH_FILL, color);

		if (getpixel (x, y) != BLACK)
			{
			line(0,0,x,y);
			//putpixel (x, y, BLACK);
			}
		else
			{
			fillellipse(x,y,20,20);
			//putpixel (x, y, color);
			}
		}

	getch ();
	closegraph ();
	return 0;
}