Compilare: user.c: In function ‘main’: user.c:10:12: warning: unused variable ‘fnlen’ [-Wunused-variable] size_t fnlen; ^ user.c:9:20: warning: unused variable ‘dirent’ [-Wunused-variable] struct dirent *dirent; ^ user.c:8:10: warning: unused variable ‘d’ [-Wunused-variable] DIR *d; ^ user.c:13:5: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.ok", "r", stdin); ^ user.c:14:5: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.out", "w", stdout); ^