C++ - how does Sleep() and cin work?

Question

Just curious. How does actually the function Sleep() work (declared in windows.h)? Maybe not just that implementation, but anyone. With that I mean - how is it implemented? How

Answer 1

The operating system schedules how processes run (which processes are eligible to run, in what order, ...). Sleep() probably issues a system call which tells the kernel “don't let me use the processor for x milliseconds”.