//bouncing ball
//...nithin

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


int main(void)
{
   int gdriver = DETECT, gmode, errorcode;
   int midx, midy,x=0,y=0,sx=1,sy=1;
   int r = 20;

   initgraph(&gdriver, &gmode, "c:\\tc\\bgi");

   midx = getmaxx() / 2;
   midy = getmaxy() / 2;

   setbkcolor(7);

   while(1)
   {
   if(x>(midx*2)-r)
   sx=0;
   if(x<r)
   sx=1;

   if(y>(midy*2)-r)
   sy=0;
   if(y<r)
   sy=1;

   if(sx==0)   x--;
   else  x++;

   if(sy==0)  y--;
   else y++;

   setfillstyle(0,2);

   setcolor(4);
   circle(x, y, r);

  /* setfillstyle(2 ,WHITE);
   fillellipse(x,y,r,r); */
   for(int j=0;j<12;j=j+2)
   arc(x, y, 230+j*6, 40-j*6, r-j);

   /*settextstyle(4, HORIZ_DIR, 0);
   outtextxy(x-10,y-20,"N"); */
   delay(5);
   cleardevice();

   if(kbhit())
   exit(1);
   }


   closegraph();
   return 0;
}