It is best to see the program in action; of course, the reader would do well (and enjoy this exercise a whole lot more!) to actually build and try it out for himself/herself:
$ ./react Usage: ./react <freq-in-millisec> [verbose-mode:[0]|1] default: verbosity is off f.e.: ./react 100 => timeout every 100 ms, verbosity Off : ./react 5 1 => timeout every 5 ms, verbosity OnHow fast can you react!?Once you run this app with the freq-in-millisec parameter,we shall start a timer anywhere between 1 and 5 seconds ofyour starting it. Watch the screen carefully; the momentthe message "QUICK! Press ^C" appears, press ^C (Ctrl+c simultaneously)!Your reaction time is displayed... Have fun!$
We first run it with a 10 millisecond frequency ...
