Overloading <<

class Set
{
    public:
        Set(int elem_num, int option)
        {
           for(int i=0; i<elem_num; i++)
           {
              if(option==FULL_SET)
                 bits.push_back(1);
             else
                 bits.push_back(0);
           }
        }

        Set operator || (Set set)
        {
           Set result;
           for(int i=0; i<bits.size(); i++)
          {
             result.bits.push_back((bits[i] || set.bits[i]));
          }
           return result;
       }

        friend ostream &operator<<(ostream& out, const Set &set)
        {
           out << "{";
           for(int i=0; i<set.bits.size(); i++)
          {
              if(i==set.bits.size()-1)
                 out << set.bits[i] << "}";
             else
                 out << set.bits[i] << ", ";
         } 
       }

    private:
        bit_vector bits;
};

		  
int main(int argc,char **argv)
{
   Set A(5, FULL_SET);
   Set B(5, EMPTY_SET);
   
   cout << "Set A: " << A << endl;
   cout << "Set B: " << B << endl;
   
   cout << "A && B " << (A&&B) << endl;   /* ONE */
   cout << "A && B" << A && B << endl;   /* TWO */
   
   return(0);
  
}