circle

函數名: circle

功 能: 在給定半徑以(x, y)為圓心畫圓

用 法: void far circle(int x, int y, int radius);

#include

#include

#include

#include

int main(void)

{

int gdriver = DETECT, gmode, errorcode;

int midx, midy;

int radius = 100;

initgraph(&gdriver, &gmode, "");

errorcode = graphresult();

if (errorcode != grOk)

{

printf("Graphics error: %s\n", grapherrormsg(errorcode));

printf("Press any key to halt:");

getch();

exit(1);

}

midx = getmaxx() / 2;

midy = getmaxy() / 2;

setcolor(getmaxcolor());

circle(midx, midy, radius);

getch();

closegraph();

return 0;

}