//robot.h
//CS576 Final Project.  4/15/00,  Zuojun Shen

class robot{
public:
  robot()
     {
      }
  robot(const robot& A)
     {
       mass = A.mass;
       arrow = A.arrow;
       center = A.center;
     }
   friend istream& operator>> (istream& is, robot& p)
     { is >> p.mass >> p.center >> p.arrow; return is; }
   friend ostream& operator<< (ostream& os, const robot& p)
   { os << " " << p.mass <<" "<< p.center << p.arrow; return os; }

  polygon arrow;
  point mass;
  double center;
 };