/* ECP: FILEname=fig14_29.cpp */
/* 1*/   const double Pi = 3.1416;

/* 2*/   class Circle : public Shape
/* 3*/   {
/* 4*/     private:
/* 5*/       double Radius;

/* 6*/     public:
/* 7*/       Circle( double R = 0.0 ) : Radius( R )
/* 8*/           { Name = "circle"; }
/* 9*/       double Area( ) const
/*10*/           { return Pi * Radius * Radius; }
/*11*/   };

/* 1*/   class Rectangle : public Shape
/* 2*/   {
/* 3*/     private:
/* 4*/       double Length;
/* 5*/       double Width;

/* 6*/     public:
/* 7*/       Rectangle( double L = 0.0, double W = 0.0 ) :
/* 8*/           Length( L ), Width( W )
/* 9*/           { Name = "rectangle"; }
/*10*/       double Area( ) const
/*11*/           { return Length * Width; }
/*12*/   };

/* 1*/   class Square : public Rectangle
/* 2*/   {
/* 3*/     public:
/* 4*/       Square( double S = 0.0 ) : Rectangle( S, S )
/* 5*/           { Name = "square"; }
/* 6*/   };