How can i redirect output of C++ programme to an exe programme?

How can i redirect output of C++ programme to an exe programme?

I was just experimenting with the brute force attack using C++ and I would
like to redirect each output of the the various combinations to a password
protected winrar file. I know to generate all the possible combinations
but how can i redirect each of these combinations to the winrar file which
asks for a password? I hope the question is clear,I am a student and knows
C++ to an extend.