set.h

This is a little tool to generate dependency and it is aimed to achieve BCD-normal form in relationa

#ifndef SET_H
#define SET_H

#include <iostream>
#include <bitset>

using namespace std;


const int MaxAttrNumber=50;

class Set
{
	//this is a long-pain for me, I have no other way to 
	//let compiler recognize this "friend" function outside declaration
	friend ostream& operator<<(ostream& out, const Set& dummy)	
	{
		for (int i=0; i<dummy.size; i++)
		{
			if (dummy.theSet.test(i))
			{
				out<<'1';
			}
			else
			{
				out<<'0';
			}
		}
		return out;
	}
private:
	bitset<MaxAttrNumber> theSet;
	int size;
	int current;
public:
	void setSize(const Set& dummy);
	int getSize(){ return size;}
	int next(int current) const;
	int first() const;	
	int count() const;
	Set intersection(const Set& dummy) const;
	Set unionSet(const Set& dummy) const;
	Set difference(const Set& dummy) const;
	
	//I am crazy about operator overloading!!!:)
	Set operator-(const Set& dummy) const;
	Set operator+(const Set& dummy) const;
	Set operator*(const Set& dummy) const;
	void operator=(const Set& dummy);
	bool operator==(const Set& dummy) const;
	bool operator!=(const Set& dummy) const;
	bool operator>(const Set& dummy) const;
	bool operator>=(const Set& dummy) const;
	bool operator<(const Set& dummy) const;
	bool operator<=(const Set& dummy) const;
	void set(int pos);
	void forEachSubSet(Set& dummy) const;//must be called before "eachSub()"
	bool eachSub(Set& dummy) const;
	bool eachSub(Set& dummy, const Set& excluding) const;
	void set();
	void reset(int pos);
	void reset();
	bool test(int pos) const;
	bool isIn(const Set& dummy) const;
	void setSize(int theSize) {size=theSize;}
	Set(int theSize=10);
};

#endif