C 程序用两种不同颜色在圆圈中绘制圆圈。

C程序

#include<graphics.h>
#include<conio.h>
#include<dos.h>


int main()
{
   int gd = DETECT, gm, x, y, color, angle = 0;
   struct arccoordstype a, b;

   initgraph(&gd, &gm, "C:\\TC\\BGI");
   delay(2000);

   while (angle <= 360)
   {
      setcolor(BLACK);
      arc(getmaxx()/2, getmaxy()/2, angle, angle + 2, 100);
      setcolor(RED);
      getarccoords(&a);
      circle(a.xstart, a.ystart, 25);
      setcolor(BLACK);
      arc(getmaxx()/2, getmaxy()/2, angle, angle + 2, 150);
      getarccoords(&a);
      setcolor(GREEN);
      circle(a.xstart, a.ystart, 25);
      angle = angle+5;
      delay(50);
   }

   getch();
   closegraph();
   return 0;
}