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int _tmain(int argc, _TCHAR* argv[])
{
        string email1S = "abc 31432";
        cmatch results;
        regex mcn("([[:digit:]]+)");
        string::const_iterator curPosition = email1S.begin();

        if (regex_search(curPosition, email1S.cend(), results, mcn))
        {
                cout << "We have a match" << endl;
                cout << results[1].str() << endl;
        }
        curPosition += results[0].length();
        cin.get();
        return 0;
}