Boost Dynamic_bitset

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C++

I am using Boost C++ library to do some work. For that i am using Dynamic_bitset of boost library, the problem with my code is that i cannot make arrays of the dynamic_bitset

below is my complete code and the questions i want to ask

#include <iostream>
#include <fstream>
#include <vector>
#include <list>
#include <algorithm>
#include <string.h>
#include <sstream>
#include <math.h>
#include <stdio.h>
//#include <bitset>
#include <boost/dynamic_bitset.hpp>
#include "boost/multi_array.hpp"


using namespace std;
#include "stringtoken_class.h"
//------------------------------------------------------------
class orand
{
public:
int numxor;
int numand;
int numlit;
};
orand ornd;
orand ifcontains(string func);

//----------------------------------------------------------
int main(int argc,char *argv[])
{
  orand ob;

    ob=ifcontains("f21=x0+x2x6x9x10x13+x2x9x10x12+x2x12+x6");
    cout<<"Number of XOR= "<<ob.numxor<<endl;
    cout<<"Number of AND= "<<ob.numand<<endl;
    cout<<"Number of LIT= "<<ob.numlit<<endl;

return 0;
}

orand ifcontains(string func)
{
//--------------------------------------------------------
//variables
    int degree,count_plus=0,count_x=0,nextint=0;
    int i,j;
    string st1,st2;
        vector<bool>bl;

//--------------------------------------------------------
    StringTokenizer stk1(func,"f");
    degree=stk1.nextIntToken();
    boost::dynamic_bitset<> product_value(degree);
    StringTokenizer stk2(func,"=");
    stk2.nextToken();
    st1=stk2.nextToken();
    StringTokenizer stk3(st1,"+");
    count_plus=stk3.countTokens();
    for(i=0;i<count_plus;i++)
    {
        StringTokenizer stk4(stk3.nextToken(),"x");
        count_x=stk4.countTokens();
        for(j=0;j<count_x;j++)
        {
                        nextint=stk4.nextIntToken();
            product_value[nextint]=1;
        }
                cout<<product_value<<endl;
               // bl.push_back(product_value);   error at this point please tell me the solution, i dont want to covert this data to Integers i want them in Ints.
                product_value.reset();
    }

}

i want to store the value of varaible "product_value" in array the type of this array is boost::dynamic_bitset. I dont want to convert the value of "product_value" to integer etc becuase i need them in same type(boost::dynamic_bitset).

I will be very thankful if someone could help.