set.h

Object-Oriented Programming With ANSI-C这本书中的源代码!找了很久

#ifndef	SET_H
#define	SET_H

extern const void * Set;

void * add (void * set, const void * element);
void * find (const void * set, const void * element);
void * drop (void * set, const void * element);
int contains (const void * set, const void * element);
unsigned count (const void * set);

#endif