Separate GUI and Console applications. How to program?

[smartalgorithm]

Hello everybody :-)
I see here are many C++ programmers. And I have a question...
Maybe you know a good tutorial(or something like it) about how it will be good to
start writing console application which will have separate GUI. So it will be possible to use scripts to call console application without any GUI and possible for not advanced users use Human Friendly GUI...
Thank you :-)

[smartalgorithm]

hmmm
is anybody already done something like this? any ideas will help me. i will do it first time...

[Athar]

Put the functions that do the actual work in a shared library. Both your console application and your GUI backend can then use the shared library to do their job.