Tokenize a string and include delimiters in C++

I'm tokening with the following, but unsure how to include the delimiters with it.

void Tokenize(const string str, vector<string>& tokens, const string& delimiters)
{

    int startpos = 0;
    int pos = str.find_first_of(delimiters, startpos);
    string strTemp;


    while (string::npos != pos || string::npos != startpos)
    {

        strTemp = str.substr(startpos, pos - startpos);
        tokens.push_back(strTemp.substr(0, strTemp.length()));

        startpos = str.find_first_not_of(delimiters, pos);
        pos = str.find_first_of(delimiters, startpos);

    }
}