C++ 字符串分割函数 str_split

void str_split(const std::string & src, const std::string & sep, std::vector<std::string> & vec_str)
{
    std::string::size_type start = ;
    for(std::string::size_type end = src.find(sep, start); end != std::string::npos; end = src.find(sep, start))
    {
        if(end > start)
        {
            vec_str.push_back(src.substr(start, end - start));
        }
        start = end + sep.length();
    }
    if(start < src.length())
    {
        vec_str.push_back(src.substr(start, src.length() - start));
    }
}