133.渔网图案

/* Fishing Net */
#include <graphics.h>
void main()
{
  int x,y,x1,y1,x0=320,y0=50;
  int i,j,n=5,r=20;
  int gdriver=VGA,gmode=VGAHI;
  initgraph(&gdriver,&gmode,"c:\\tc");
  cleardevice();
  setbkcolor(9);
  outtextxy(80,20,"This program show the Fishing Net picture.");
  for(i=0;i<=2*n;i++)
  {
    x1=x0-i*r;
    y1=y0+i*r;
    for(j=0;j<=n-1;j++)
    {
      x=x1+2*j*r;
      y=y1+2*j*r;
      arc(x,y,180,270,r);
      arc(x,y+2*r,0,90,r);
    }
  }
  x1=x0-2*r;
  y1=y0;
  for(i=0;i<=2*n;i++)
  {
    x1=x1+r;
    y1=y1+r;
    for(j=0;j<=n-1;j++)
    {
      x=x1-2*j*r;
      y=y1+2*j*r;
      arc(x,y,90,180,r);
      arc(x-2*r,y,270,360,r);
    }
  }
  outtextxy(80,460,"Press any key to quit...");
  getch();
  closegraph();
}