In C++ I typically use system("TIMEOUT /T 10") to pause for 10 seconds or X amount of seconds, however, this only works on Windows and I want to be able to write my program to run on Mac, Windows and Linux while also telling the user that the program is waiting for X amount of seconds with a count down like the TIMEOUT command provides on windows.

Is there anyway to do this?

Thanks in Advance, I am kind of new to the programing space.