17.3 Files and streams 1O流模板之间的继承关系 basic ios basic istream basic ostream basic ifstream basic iostream basic ofstream basic fstream 为了在C++中执行文件处理,必须包含头文件 <iostream>FA<fstream> 0 2018, SEU. All rights reserved. 12© 2009, SEU. All rights reserved. © 2018, SEU. All rights reserved. 12 17.3 Files and Streams -- I/O流模板之间的继承关系 为了在C++中执行文件处理，必须包含头文件 <iostream>和<fstream>