C语言库函数arc函数名：arc功 能：画一弧线函数与形参类型：void far arc(int x, int y, int stangle, int endangle, int radius);程序例：#include #include #include #include int main(void){/* request auto detection */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(); /* an error occurred */if (errorcode != grOk){printf("Graphics error: %s ", 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;}

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