c++， 字符串分割

vector<string> split(const string &s, char delim)
    {
        vector<string> words;
        for (string::size_type i = 0; i < s.size();) {

            while (i < s.size() && s[i] == delim)
                i++;
            if (i == s.size())
                break;

            string::size_type j = s.find_first_of(delim, i);
            if (j != string::npos) {
                words.push_back(s.substr(i, j-i));
                i = j+1;
            } else {
                words.push_back(s.substr(i));
                break;
            }
        }

        return words;
    }