#include<math.h>
#include<graphics.h>
#define PI 3.14159
#define D 100
main()
{ float a,e,x1,y1,x2,y2;
int gdriver=VGA,gmode=VGAHI;
initgraph(&gdriver,&gmode,"d:\\tc");
cleardevice();
gotoxy(26,26);
 printf("感谢使用由第九组成员编写的程序\n");
 printf("组长：刘明明\n");
 printf("成员：刘刚，申时永，张琴，简孝文\n");
 setcolor(GREEN); setbkcolor(0);
for(a=0.0;a<2*PI;a+=2*PI/720)
{
  e=D*(1+sin(4*a));
  x1=320+e*cos(a);
  x2=320+e*cos(a+PI/5);
  y1=240+e*sin(a);
  y2=240+e*sin(a+PI/5);
  line(x1,y1,x2,y2);
    }

     getch();
closegraph();  }

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