Name
   iostream_intro - Introduction	to the HP C++ Standard	Library	iostream
   Package

   This page is an introduction to the ANSI I/O stream classes. If you
   would like information on the pre-ANSI I/O stream package, use the
   command:

        help cxxl

 Description

 Compatibility

   The ANSI Standard Library provides two macros that enable or
   disable use of the ANSI iostream package at compile
   time.  The ANSI  iostream package may cause compile time and/or
   run time behavior incompatibilities that require source
   code changes to resolve.   These macros allow users to choose the
   iostream package they want.

   Check	the C++ documentation for a description of the default
   settings of these macros in different compiler modes.

   The -D HP C++ compiler switch can be	used on	the compile
   command line without requiring source code	changes	while the
   #define line should be added	to the source code prior to any	#include
   statement.

   All source modules within the	same application must be compiled in
   the same mode.

   ________________________________________________________________
 		       __USE_STD_IOSTREAM
 	      Usage		  Description
   ________________________________________________________________
   cxx -D__USE_STD_IOSTREAM	  Use ANSI iostream package
   #define __USE_STD_IOSTREAM	  Use ANSI iostream package
   ________________________________________________________________
 		      __NO_USE_STD_IOSTREAM
 	      Usage		  Description
   ________________________________________________________________
   cxx -D__NO_USE_STD_IOSTREAM	  Use pre-ANSI iostream	package
   #define __NO_USE_STD_IOSTREAM	  Use pre-ANSI iostream	package
   ________________________________________________________________

 See Also
   basic_iostream