Compilare: user.c: In function ‘main’: user.c:50:11: warning: unused variable ‘f2’ [-Wunused-variable] FILE *f1,f2; ^ user.c:50:8: warning: unused variable ‘f1’ [-Wunused-variable] FILE *f1,f2; ^ user.c:51:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("aurel.in","r",stdin); ^ user.c:52:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("aurel.out","w",stdout); ^ user.c:56:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nr_teste); ^ user.c:59:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nr_nmr_sol); ^ user.c:60:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &sol_suma); ^