比如下列程序，只能再TC运行，我要再VC上运行的话，如何修改啊?
#include <graphics.h>
#include <conio.h>

int main(void)
{
   int gdriver = DETECT, gmode;
   int xcenter, ycenter, i;

   initgraph(&gdriver,&gmode,"");
   xcenter = getmaxx() / 2;
   ycenter = getmaxy() / 2;

   for (i=0; i<13; i++)
   {
      setfillstyle(i,WHITE);
      fillellipse(xcenter,ycenter,100,50);
      getch();
   }

   closegraph();
   return 0;
}