pieslice

程序例:

#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 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;