Bison Output

[Luis Vital]

Hi,

I have used Bison sometimes.
Usually, after compiling Bison and Flex files the input come from a file
that we redirect to the executable and the output goes to the screen.
If I want to give the input file as an argument in the command line I can
use 'yyin'.
And what about the output? How can I send it to a file without having to
redirect it?
Thanks in advance,

Luis Vital