#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int midx, midy;
int i,radius = 30;
/* 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());
circle(midx,midy,radius);
/* draw the circle */
for(i=1;i<9;i++){
delay(100);
setcolor(BLACK);
circle(midx, midy, radius);
midy=midy+i*5;
setcolor(getmaxcolor());
circle(midx,midy,radius);
}
/* clean up */
getch();
closegraph();
return 0;
}