******** fig5.14 **********

	enum kind_of_entry { legitimate, empty, deleted };

	struct hash_entry
	{
		element_type element;
		enum kind_of_entry info;
	};

	typedef INDEX position;
	typedef struct hash_entry cell;

	struct hash_tbl
	{
		unsigned int table_size;
		cell *the_cells; /* an array of hash_entry cells, allocated later */
	};
	typedef struct hash_tbl *HASH_TABLE;