Animated Ellipse image

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

#include<dos.h>

int main(void)

{

   /* request auto detection */

   int gdriver = DETECT, gmode, errorcode;

   int left, top, right, bottom;

   int midx,midy,i,stangle = 0,endangle = 360,xradius = 50,yradius = 50;

   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "");

   /* read result of initialization */

   errorcode = graphresult();

   if (errorcode != grOk)  /* an error occurred */

   {

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1); /* terminate with an error code */

   }

   left = getmaxx() / 2 - 50;

   top = getmaxy() / 2 - 50;

   right = getmaxx() / 2 + 50;

   bottom = getmaxy() / 2 + 50;

   /* draw a rectangle */

   rectangle(left,top,right,bottom);

/*************************************************************/

/* read result of initialization */

errorcode = graphresult();

if (errorcode != grOk)

/* an error occurred */

{

   printf("Graphics error: %s\n", grapherrormsg(errorcode));

   printf("Press any key to halt:");

   getch();

   exit(1);

/* terminate with an error code */

}

midx = getmaxx() / 2;

midy = getmaxy() / 2;

setcolor(getmaxcolor());

/* draw ellipse */

ellipse(midx, midy, stangle, endangle,

xradius, yradius);

stangle = 0,endangle = 360,xradius = 45,yradius = 45;

 for(i=0;i<=xradius;)

 {

ellipse(midx, midy, stangle, endangle,

xradius, yradius);

     xradius=xradius-5;

     yradius=yradius-5;

     delay(1000);

  }

/******************/

   /* clean up */

   getch();

   closegraph();

   return 0;

}