===== arc =====
====Syntax of arc ====
#include
void arc(int x, int y, int stangle, int endangle, int radius);
==== Description of arc ====
arc draws a circular arc in the current drawing color centered at (x,y)
with a radius given by radius. The arc travels from stangle to endangle.
If stangle equals 0 and endangle equals 360, the call to arc draws a
complete circle.
The angle for arc is reckoned counterclockwise, with 0 degrees at 3
o'clock, 90 degrees at 12 o'clock, and so on.
The linestyle parameter does not affect arcs, circles, ellipses, or pie
slices. Only the thickness parameter is used.
If you are using a CGA in high resolution mode or a monochrome graphics
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, pass the value 1 to those functions that
alter the fill or drawing color (setcolor, setfillstyle, and
setlinestyle, for example), instead of a symbolic color constant (defined
in graphics.h).
==== Example of arc ====
/* arc example */
#include
#include
#include
#include
int main(void)
{
/* request autodetection */
int gdriver = DETECT, gmode, errorcode;
int midx, midy;
int stangle = 45, endangle = 135;
int 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;
setcolor(getmaxcolor());
/* draw arc */
arc(midx, midy, stangle, endangle, radius);
/* clean up */
getch();
closegraph();
return 0;
}
==== See also ====
[[circle]]
[[ellipse]]
[[fillellipse]]
[[getarcoords]]
[[getaspectratio]]
[[pieslice]]
[[sector]]
===== output of arc example =====
no output of example at the moment
do not hesitate and add it...