C++ stringstream 用法

Question

请问以下代码中ss<<的 用法是什么意思啊？ 谢谢！

  stringstream ss;
        ss << "insert into list (id, name, username, idcard, price, count) values(";
        ss << "'" << id << "',";
        ss << "'" << name << "',";
        ss << "'" << username << "',";
        ss << "'" << idcard << "',";
        ss << price << ",";
        ss << count << ");";

Answer 1

就是向stringstream对象输入数据，这个对象主要用来拼接数据用的，完了通过str()这个成员函数获取拼接的字符串