Managing output streams: class ostream
Objects of class, ostream, inherit the generic methods from ios, and in addition have the following methods available. Declarations for this class come from iostream.h.
See also the following documentation’s discussion for more information.
ostream::ostream () Constructor
The simplest form of the constructor for an ostream simply initializes a new ios object.
ostream::ostream (streambuf* sb [, ostream tie]) Constructor
This alternative constructor requires a first argument, sb, (of type, streambuf*) to use an existing open stream for output. It also accepts an optional second argument, tie, to specify a related ostream* as the initial value for ios::tie.
If you use this constructor, the argument, sb, is not destroyed (or deleted or closed) when the ostream is destroyed.