C++中实现字符串函数split

int split(const string &str, vector<std::string> &des, char delim) {
    char str_tmp[str.size() + 1];
    snprintf(str_tmp, sizeof(char) * (str.size() + 1), str.c_str());
    while(1) {
        int pos = str.find(delim);
        if(pos == 0) {
            str = str.substr(1);
            continue;
        }
        if(pos<0) {
            des.push_back(str);
            break;
        }
        string tmp = str.substr(0, pos);
        str = str.substr(pos+1);
        des.push_back(tmp);
    }

    return des;
}