How to send a response to a request to the linux console from a c++ program?

Question

linux

I execute the command system("nc random_url random_port"). In response to this, I receive a request for a password. How can I answer this request? (I use the cstdlib library)

Answer 1

Alternatively, use popen

Answer 2

Generate random_port > 1024 and there will be no password prompt.