/* Rectangle.h
   Class definition for rectangles
*/

/**** Name of the class ****/
typedef struct rectangle *Rectangle;

/**** Methods for operating on the class ****/

/* Constructor */
Rectangle ConsRectangle( double height, double width );
/* Destructor */
void DestroyRectangle( Rectangle r );

/* Obtain the current height */
double Height( Rectangle r );
/* Change the height */
void SetHeight( Rectangle r, double height );

/* Obtain the current width */
double Width( Rectangle r );
/* Change the width */
void SetWidth( Rectangle r, double width );

/* Properties of rectangles */
double Perimeter( Rectangle r );
double Area( Rectangle r );