Парсинг строки

#include <iostream>
#include <vector>
#include <string>
 
std::vector<std::string> parse( const std::string & str , char delim )
{
   std::vector<std::string> result ;
   size_t pos = 0 ;
   size_t size = str.size() ;
   size_t prevPos = 0 ;
   while ( pos < size )
   {
      prevPos = pos ;
      if ( (pos=str.find_first_of(delim,pos)) == std::string::npos )
      {
         result.push_back( str.substr(prevPos) ) ;
         break ;
      } else
      {
         result.push_back ( str.substr(prevPos,pos-prevPos) ) ;
      }
      ++pos ;
   }
   return result ;
}
 
template < typename T >
std::ostream & operator<< ( std::ostream & stream , const std::vector<T> & vec )
{
   for ( typename std::vector<T>::const_iterator it = vec.begin() , itEnd = vec.end() ; it!=itEnd ; ++it )
      stream << *it << '\n' ;
   return stream ;
}
 
 
int main()
{
   std::cout << parse("Part1:Part2:Part3",':') << std::endl ;
}

vector <string> parse (string stroka, char delit)
{
    vector <string> result(0);
    string cur = "";
    for (int i = 0; i < stroka.length() + 1; i++)
    {
        if((stroka[i] != delit) && (stroka[i] != '\0')) cur += stroka[i];
        else 
        {
            result.push_back(cur);
            cur = "";
        }
    }
    return result;
}

vector <string> parse2 (string stroka, string delit)
{
    vector <string> result;
    char* token;
    char* mstroka = (char*)stroka.c_str();
    char* mdelit = (char*)delit.c_str();
 
    token = strtok(mstroka, mdelit);
    while (token != NULL)
    {
        if(token) result.push_back(token);
        token = strtok(NULL, mdelit);
    }
    return result;
}