#include <graphics.h>	
#include <stdlib.h>	
#include <stdio.h>	
#include <conio.h>	
#include <math.h>	
#define Pi 3.1415926536	
// this function initializes graphics mode	
// it will work only if you're using Borland C++ compiler & BGI drivers	
// if you're using another compiler you should overwrite body of this function	
void init_gr(void)	
{	
   /* request autodetection */	
   int gdriver = DETECT, gmode, errorcode;	
   /* initialize graphics mode */	
   initgraph(&gdriver, &gmode, "");	
   /* read result of initialization */	
   errorcode = graphresult();	
   if (errorcode != grOk)    /* an error occurred */	
   {	
      printf("Graphics error: %s\n", grapherrormsg(errorcode));	
      printf("Press any key to halt:");	
      getch();	
      exit(1);               /* return with error code */	
   }	
}	
// this function shuts graphics mode down	
// it will work only if you're using Borland C++ compiler & BGI drivers	
// if you're using another compiler you should overwrite body of this function	
void end_gr(void)	
{	
  closegraph();	
}	
// this function moves CP to (x,y) position	
// it will work only if you're using Borland C++ compiler & BGI drivers	
// if you're using another compiler you should overwrite body of this function	
void MoveTo(int x, int y)	
{	
  moveto(x,y);	
}	
// this function draws a line to (x,y) position	
// it will work only if you're using Borland C++ compiler & BGI drivers	
// if you're using another compiler you should overwrite body of this function	
void LineTo(int x, int y)	
{	
  lineto(x,y);	
}	
const N=6; // number of points in the figure	
// coordinates of all given points	
enum actions {MOVE,DRAW};	
struct	
{	
  actions action;	
  int x;	
  int y;	
} figure[N]={{MOVE,360,270},{DRAW,360,260},{DRAW,355,260},{DRAW,360,250},	
     {DRAW,365,260},{DRAW,360,260}};	
int x0,y0,dx,dy;	
float phi;	
int main(void)	
{	
  // initializing graphics mode	
  init_gr();	
  // rotating about (x0,y0)	
  x0=300;	
  y0=260;	
  // by 10 degrees	
  phi=45.0*Pi/180.0;	
  // main loop	
  for(int i=0;i<8;i++)	
  {	
    // rotating the figure	
    for (int j=0;j<N;j++)	
    {	
      dx=figure[j].x-x0;	
      dy=figure[j].y-y0;	
      figure[j].x=x0+dx*cos(phi)-dy*sin(phi);	
      figure[j].y=y0+dx*sin(phi)+dy*cos(phi);	
    }	
    // drawing rotated figure	
  for (j=0;j<N;j++)	
      if (figure[j].action==MOVE)	
        MoveTo(figure[j].x,figure[j].y);	
      else	
        LineTo(figure[j].x,figure[j].y);	
  }	
  // clean up	
  getch();	
  end_gr();	
  return 0;	
}