Animated circle c graphics

/*==============================

     Girfa Student Help

     Program : Animated circle

     More Program :http://girfahelp.blogspot.in/p/graphics-c-language.html

================================*/

#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 midx, midy;

   int radius = 100;

   int i,j;

   /* 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 */

   }

   midx = getmaxx() / 2;

   midy = getmaxy() / 2;

   setcolor(getmaxcolor());

   for(i=1,j=1;i<=200;i+=2)

   {

     setcolor(j++);

     circle(j, midy,i);

     if(j==10)

          j=1;

     delay(30);

   }

   for(i=1,j=1;i<=200;i+=2)

   {

     setcolor(j++);

     circle(midx,getmaxy()-1,i);

     if(j==10)

          j=1;

     delay(20);

   }

   for(i=1,j=1;i<=200;i+=2)

   {

     setcolor(j++);

     circle(getmaxx(), midy,i);

     if(j==10)

          j=1;

     delay(20);

   }

   for(i=1,j=1;i<=200;i+=2)

   {

     setcolor(j++);

     circle(midx,0,i);

     if(j==10)

          j=1;

     delay(20);

   }

   settextstyle(4,0,3);

   outtextxy(midx-52,midy-10,"Girfa Student Help");

   /* clean up */

   getch();

   closegraph();

   return 0;

}

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