C++ How to make permanent output, and only then, user something to execute input in a loop?

Question

C++ / C#

C++ How to make permanent output, and only then, user something to execute input in a loop?
Even simpler, the loop outputs something without paying attention to _gectch(), but as soon as the user enters some character, it accepts it and outputs it.

Answer 1

You did not specify an operating system. If you have linux (or something similar) - here is a solution using select .
In general, you can start a separate thread that loops what you want and checks if the event ( WaitForSingleObject , with timeout 0) has been set. In the main thread, create an event ( CreateEvent ), wait as usual for _getch, when the character is entered - use SetEvent to signal this to the second thread, there is also a ResetEvent function - to reset the event after processing (so that you can loop after the next character entered again install). This is for windows.
Well, yes, _getch is never C ++, but bare C.