TITLE: outputting to two streams

(Source: comp.lang.c++, 17 Nov 2000)


JACQUES: jacques (innocence@waveform.org)

: i have a function which needs to either send various bits of text output
: to std::cout or to a std::ofstream. is there any elegant way around the 
: following?
:
: if (use_file)
:    my_text_file << "xxxxxxxx";
: else
:    std::cout << "xxxxxxxx";


KUEHL: Dietmar Kuehl <dietmar_kuehl@yahoo.de>

  std::ostream out(use_file? my_text_file.rdbuf(): std::cout.rdbuf());

  out << "xxxxxxxxxx";

The other suggestions I have seen are kind of lame...



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