题目：画图，学用circle画圆形。　　　

程序源代码：

#include "graphics.h"

main()

{int driver,mode,i;

float j=1,k=1;

driver=VGA;mode=VGAHI;

initgraph(&driver,&mode,"");

setbkcolor(YELLOW);

for(i=0;i<=25;i++)

{

setcolor(8);

circle(310,250,k);

k=k+j;

j=j+0.3;

}

}

error:题目：画图，学用circle画圆形。/main.c:10:10: 'graphics.h' file not found

xcode环境下没有graphics.h