C++ string类型的split字符串分割函数

std::vector<std::string> split(const  std::string& s, const std::string& delim)
{
std::vector<std::string> elems;
size_t pos = 0;
size_t len = s.length();
size_t delim_len = delim.length();
if (delim_len == 0) return elems;
while (pos < len)
{
int find_pos = s.find(delim, pos);
if (find_pos < 0)
{
elems.push_back(s.substr(pos, len - pos));
break;
}
elems.push_back(s.substr(pos, find_pos - pos));
pos = find_pos + delim_len;
}
return elems;
}