/* * Same as stringtok_h.txt, but doesn't (visiably) use C functions.*/#include <string>// The std:: prefix is not used here, for readability, and a line like// "using namespace std;" is dangerous to have in a header file.template <typename Container>voidstringtok (Container &container, std::string const &in,           const char * const delimiters = " \t\n"){    const std::string::size_type len = in.length();          std::string::size_type i = 0;    while ( i < len )    {        // eat leading whitespace        i = in.find_first_not_of (delimiters, i);        if (i == std::string::npos)            return;   // nothing left but white space        // find the end of the token        std::string::size_type j = in.find_first_of (delimiters, i);        // push token        if (j == std::string::npos) {            container.push_back (in.substr(i));            return;        } else            container.push_back (in.substr(i, j-i));        // set up for next loop        i = j + 1;    }}