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'.