#include <graphics.h> void sector(int x, int y, int stangle, int endangle, int xradius, int yradius);
The angles for sector are given in degrees. They are measured counter-clockwise with 0 degrees at 3 o'clock, 90 degrees at 12 o'clock, and so on.
If an error occurs while the pie slice is filling, graphresult returns a value of -6 (grNoScanMem).
/* sector 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, i;
int stangle = 45, endangle = 135;
int xrad = 100, yrad = 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 */
}
midx = getmaxx() / 2;
midy = getmaxy() / 2;
/* loop through the fill patterns */
for (i=EMPTY_FILL; i<USER_FILL; i++) {
/* set the fill style */
setfillstyle(i, getmaxcolor());
/* draw the sector slice */
sector(midx, midy, stangle, endangle, xrad, yrad);
getch();
}
/* clean up */
closegraph();
return 0;
}