#include <graphics.h>
void pieslice(int x, int y, int stangle, int endangle, int radius);
 

pieslice draws and fills a pie slice centered at (x,y) with a radius
given by radius. The slice travels from stangle to endangle. The slice is
outlined in the current drawing color and then filled using the current
fill pattern and fill color.
The angles for pieslice are given in degrees. They are measured
counterclockwise, with 0 degrees at 3 o'clock, 90 degrees at 12 o'clock,
and so on.
If you're using a CGA or monochrome adapter, the examples in online Help
that show how to use graphics functions might not produce the expected
results. If your system runs on a CGA or monochrome adapter, use the
value 1 (one) instead of the symbolic color constant, and see the second
example under arc whis shows how to use the pieslice function.

/* pieslice example */
 
#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
 
int main(void)
{
   /* request autodetection */
   int gdriver = DETECT, gmode, errorcode;
   int midx, midy;
   int stangle = 45, endangle = 135, radius = 100;
 
   /* 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;
 
   /* set fill style and draw a pie slice */
   setfillstyle(EMPTY_FILL, getmaxcolor());
   pieslice(midx, midy, stangle, endangle, radius);
 
   /* clean up */
   getch();
   closegraph();
   return 0;
}

fillelipse graphresult sector setfillstyle

  no output of example at the moment
  do not hesitate and add it...