// registrar.hpp	A (static) object for maintaining object serial numbers//			for classes that care about such things.  This particulary//			useful for random number generators, so they don't always//			generate the same sequence when declared as automatics//			The registrar object is instantiated in the '.cpp' file//			the user just calls the serial_number method:////	int my_id = registrar.serial_number();//// rcsid: @(#)registrar.hpp	1.1 13:43:51 10/14/93   EFC#ifndef REGISTRAR_HPP_#define REGISTRAR_HPP_ 1.1class Registrar{	private:	  static unsigned int seq_no;	public:	  Registrar();	 ~Registrar() {}	  unsigned int serial_number();};extern Registrar registrar;#endif