#define V_ARG(type,var) type var = va_arg(ap,type)
/* set related functions */
+set *newSet (void);
void *addSet (set **, void *);
void *addSetHead (set **, void *);
void *getSet (set **);
void *setFirstItem (set *);
void *setNextItem (set *);
void setToNull (void **);
-
+set *reverseSet (set *);
+void deleteSet(set **s);
#endif