Assign a subclass object to the parent class reference

# Include <iostream>
Using namespace STD;
Class Point
{
Public:
Point (float = 0, float = 0 );
Void setpoint (float, float );
Float getx () const {return X ;}
Float Gety () const {return y ;}
Friend ostream & operator <(ostream &, const point &);
Protected:
Float X, Y;
};

Point: Point (float a, float B)
{X = A; y = B ;}
Void point: setpoint (float a, float B)
{X = A; y = B ;}
Ostream & operator <(ostream & output, const point & P)
{Output <"[" <p. x <"," <p. Y <"]" <Endl;
Return output;
}

Class circle: Public point
{Public:
Circle (float x = 0, float y = 0, float r = 0 );
Void setradius (float );
Float getradius () const;
Float area () const;
Friend ostream & operator <(ostream &, const circle &);
Protected:
Float radius;
};

Circle: Circle (float a, float B, float R): Point (a, B), radius (r ){}

Void circle: setradius (float R)
{Radius = r ;}

Float circle: getradius () const {return radius ;}

Float circle: Area () const
{Return 3.14159 * radius ;}

Ostream & operator <(ostream & output, const circle & C)
{Output <"center = [" <C. x <"," <C. Y <"], r =" <C. radius <", Area =" <C. area () <Endl;
Return output;
}

Class cylinder: public circle
{Public:
Cylinder (float x = 0, float y = 0, float r = 0, float h = 0 );
Void setheight (float );
Float getheight () const;
Float area () const;
Float volume () const;
Friend ostream & operator <(ostream &, const cylinder &);
Protected:
Float height;
};

Cylinder: cylinder (float a, float B, float R, float H)
: Circle (a, B, R), height (H ){}

Void cylinder: setheight (float h) {Height = H ;}

Float cylinder: getheight () const {return height ;}

Float cylinder: Area () const
{Return 2 * circle: Area () + 2*3.14159 * radius * height ;}

Float cylinder: volume () const
{Return circle: Area () * height ;}

Ostream & operator <(ostream & output, const cylinder & CY)
{Output <"center = [" <cy. x <"," <cy. Y <"], r =" <cy. radius <", H =" <cy. height
<"\ Narea =" <Cy. Area () <", volume =" <Cy. Volume () <Endl;
Return output;
}

int main ()
{cylinder cy1 (3.5, 6.4, 5.2, 10);
cout <"\ noriginal cylinder: \ Nx = " point & Pref = cy1;
cout <" \ npref as a point: " circle & CREF = cy1;
cout <"\ ncref as a circle:" return 0;
}