Compilare: user.c: In function ‘main’: user.c:38:15: warning: unused variable ‘i’ [-Wunused-variable] int A, B, i, maxdif = -1, poz1, poz2; ^ user.c:35:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("difprim.in", "r", stdin); ^ user.c:36:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("difprim.out", "w", stdout); ^ user.c:39:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &A, &B); ^