零星笔记，待整理
//用 getline 函数从输入读取整行内容。然后为了获得每行中的单词，将一个 //istringstream 对象与所读取的行绑定起来，这样只需要使用普通的 //string 输入操作符即可读出每行中的单词。 string line, word;// will hold a line and word from input, rectively while (getline(cin, line)) { // read a line from the input into line // do per-line processing istringstream stream(line); // bind to stream to the line we read while (stream >> word) { // read a word from line // do per-word processing } }//stringstream 对象的一个常见用法是，需要在多种数据类型之间实现自动格式化时//使用该类类型 int val1 = 512, val2 = 1024; ostringstream format_message; // ok: converts values to a string representation format_message << "val1: " << val1 << "\n" << "val2: " << val2 << "\n";//相反，用 istringstream 读 string 对象，即可重新将数值型数据找回来 istringstream input_istring(format_message.str()); string dump; // place to dump the labels from the formatted message input_istring >> dump >> val1 >> dump >> val2; cout << val1 << " " << val2 << endl; // prints 512 1024