problem with kbhit()

[cyberant]

I have the problem that if I jump into a function - for example functionA() I want to check for another character and this only gets recognized if Im done with this functionA(). Of Course I can use another kbhit() inside the functionA() but inside a are much more other functions which for example drive a stepper motor and if i use kbhit() everywhere inside its very confusing.
Is there a better way to solf this?

[libor]

This is what interrupts are for.
You fill a buffer with incoming data in an interrupt service routine, and check the buffer's contents in the main code.
There are plenty of examples (here and elsewhere) how to do it.