The GNU C++ Iostream Library - Ostream Housekeeping

Miscellaneous ostream utilities

You may need to use these ostream methods for housekeeping:

Method ostream& flush ()

Deliver any pending buffered output for this ostream .

Method int ostream::opfx ()

opfx is a prefix method for operations on ostream objects; it is designed to be called before any further processing. See ostream::osfx for the converse.

opfx tests that the stream is in state good , and if so flushes any stream tied to this one.

The result is 1 when opfx succeeds; else (if the stream state is not good ), the result is 0 .

Method void ostream::osfx ()

osfx is a suffix method for operations on ostream objects; it is designed to be called at the conclusion of any processing. All the ostream methods end by calling osfx . See ostream::opfx for the converse.

If the unitbuf flag is set for this stream, osfx flushes any buffered output for it.

If the stdio flag is set for this stream, osfx flushes any output buffered for the C output streams `stdout' and `stderr'.