Compilare: user.c: In function ‘main’: user.c:19:5: warning: statement with no effect [-Wunused-value] for (q; q!=0; q--){ ^ user.c:17:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.c:15:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("oluna.in","r",stdin); ^ user.c:16:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("oluna.out","w",stdout); ^ user.c:18:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ user.c:20:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^