std::ios_base. 개요

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The class ios_base is a multipurpose class that serves as the base class for all I/O stream classes. It maintains several kinds of data: 1) state information: stream status flags. 2) control information: flags that control formatting of both input and outp

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The class ios_base is a multipurpose class that serves as the base class for all I/O stream classes.

It maintains several kinds of data:

1. state information : stream status flags

2) control information: flags that control formatting of both input and output sequences and the imbued locale.

3) private storage: indexed extensible data structure that allows both long and void* members, which may be implemented as two arbitrary-length arrays or a single array of two-element structs or another container.

4) callbacks: arbitrary number of user-defined functions to be called from imbue(), basic_ios::copy_fmt(), and ~ios_base