/in/foo.c: In function 'hanoiStep':
/in/foo.c:18:19: warning: variable 'temp' set but not used [-Wunused-but-set-variable]
     int from, to, temp;
                   ^~~~
/in/foo.c:18:15: warning: variable 'to' set but not used [-Wunused-but-set-variable]
     int from, to, temp;
               ^~