Compilare: user.cpp: In function ‘int main()’: user.cpp:25:14: warning: unused variable ‘i’ [-Wunused-variable] for (int i = 1; step; step >>= 1) ^ user.cpp:24:23: warning: unused variable ‘aux’ [-Wunused-variable] int rez = MAXVAL, aux; ^ user.cpp:17:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fact.in", "r", stdin); ^ user.cpp:18:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fact.out", "w", stdout); ^ user.cpp:21:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^