#include <iostream>
#include <graphics.h>
#include <math.h>
using namespace std;

int main()
{
initwindow(800,600);
double xa=400;
double ya=400;
double xb=500;
double yb=400;
double xc=500;
double yc=450;
double xd=400;
double yd=450;
double xm=xb+40;
double ym=yb+25;

double xa1=xm+(xa-xm)*1.5;
double ya1=ym+(ya-ym)*1.5;
double xb1=xm+(xb-xm)*1.5;
double yb1=ym+(yb-ym)*1.5;
double xc1=xm+(xc-xm)*1.5;
double yc1=ym+(yc-ym)*1.5;
double xd1=xm+(xd-xm)*1.5;
double yd1=ym+(yd-ym)*1.5;
for(int i=0;i<=360;i++)
{
 double    xa2=xm+(xa1-xm)*cos((i*3.14)/180)-(ya1-ym)*sin((i*3.14)/180);
 double    ya2=ym+(xa1-xm)*sin((i*3.14)/180)+(ya1-ym)*cos((i*3.14)/180);
 double    xb2=xm+(xb1-xm)*cos((i*3.14)/180)-(yb1-ym)*sin((i*3.14)/180);
 double    yb2=ym+(xb1-xm)*sin((i*3.14)/180)+(yb1-ym)*cos((i*3.14)/180);
 double    xc2=xm+(xc1-xm)*cos((i*3.14)/180)-(yc1-ym)*sin((i*3.14)/180);
 double    yc2=ym+(xc1-xm)*sin((i*3.14)/180)+(yc1-ym)*cos((i*3.14)/180);
 double    xd2=xm+(xd1-xm)*cos((i*3.14)/180)-(yd1-ym)*sin((i*3.14)/180);
 double    yd2=ym+(xd1-xm)*sin((i*3.14)/180)+(yd1-ym)*cos((i*3.14)/180);
setcolor(15);
line(xa2,ya2,xd2,yd2);
line(xd2,yd2,xc2,yc2);
line(xc2,yc2,xb2,yb2);
line(xa2,ya2,xb2,yb2);
line(xb2,yb2,xm,ym);
line(xm,ym,xc2,yc2);
delay(20);
setcolor(0);
line(xa2,ya2,xd2,yd2);
line(xd2,yd2,xc2,yc2);
line(xc2,yc2,xb2,yb2);
line(xa2,ya2,xb2,yb2);
line(xb2,yb2,xm,ym);
line(xm,ym,xc2,yc2);
}


getch();

return 0;
}