cin获取整行并跳过空行

void test() {
    std::stringstream iss;
    std::string str = "";
    while(getline(std::cin, str)) {//获取整行
        if (str.length() == 0) {//跳过空行
            continue;
        }
       
        //do your work here
        
        iss.clear();
        iss.str(str);
        std::string m_str;
        int m_i;
        iss >> m_str >> m_i;
        std::cout << m_i << m_str << std::endl;
        
        //do your work above
        
        str.clear();
    }
}