read from keyboard non blocking

hey there

is there a way to read from keyboard without breaking a program in C.

meaning if I use getchar the prog waits for new input from the keyboard but I want the program to be executed until it gets a stop character. I know I can use multi threading but is there s tutorial on something simpler?

>>9
You're not qualified to answer this question. I hope I never have to use any software you've written.