Is there a way to get text as soon as possible without waiting for a newline?

Question

I\'m using C. I wrote a very simpe program which prints back the input, using getchar() and putchar() or printf(). Is there any way to make it so as soon as the user types one k

Answer 1

On Linux you can take over the terminal:

#include 
#include 
#include 

system("stty raw"); /* raw output to terminal, direct feedback */
system("clear"); /* clear screen */

printf("Press a key");
answer = getchar();

system("stty cooked"); /* revert back*/