source: trunk/source/interfaces/test/G4cout_test01/README@ 1167

                README G4cout_test01:

                                        Nov. 09 2002
                                        H. Yoshida
                                                update for Geant4.4.1

 This example program illustrates how to use "setCoutDestination" of G4cout
in order to redirect the stream between two sessions. Usually the constructor
of a UI class, f.e., G4UIterminal, does setCoutDestination(this) and 
the destructor does setCoutDestination(NULL). 
By explicitly using setCoutDestination, user can redirect G4cout/cerr to one of 
the sessions opened.

 This example is created after examples/novice/exampleN01 which is a pure batch
one. But this example has an interactive session G4UITerminal(new G4UItcsh) and
another session "MySession" to  redirect the output to a file named "Mylog".


At first, G4UItcsh is instantiated to provide an interactive session.
When user types in "exit" command, G4UItcsh session is closed, and
then MySession is used so that all subsequent G4cout/cerr are saved 
in the file "Mylog".

Finally both instances are deleted and the last messages are shown
on the default display.

Note that when there is no instance of UI sessions, G4cout/cerr are sent to
the display by default.