/*----------------------------------------------------------------------  File     : Item.h  Contents : itemset management  Author   : Bart Goethals  Update   : 4/4/2003 ----------------------------------------------------------------------*/#include <set>using namespace std;class Item{public:	Item(int i) : id(i), support(0), children(0) {}	Item(const Item &i) : id(i.id), support(i.support), children(i.children) {}	~Item(){}	int getId() const {return id;}	int Increment(int inc = 1) const {return support+=inc;}	set<Item> *makeChildren() const;	int deleteChildren() const;	int getSupport() const {return support;}	set<Item> *getChildren() const {return children;}	bool operator<(const Item &i) const{return id < i.id;}private:	const int id;	mutable int support;	mutable set<Item> *children;};