Compilare: user.cpp: In function ‘void Cit_d(int&)’: user.cpp:15:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++pz == DIM) fread(ax, 1, DIM, stdin), pz = 0; ^ user.cpp:20:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++pz == DIM) fread(ax, 1, DIM, stdin), pz = 0; ^ user.cpp: In function ‘void Cit_lld(long long int&)’: user.cpp:28:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++pz == DIM) fread(ax, 1, DIM, stdin), pz = 0; ^ user.cpp:33:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (++pz == DIM) fread(ax, 1, DIM, stdin), pz = 0; ^ user.cpp: In function ‘int main()’: user.cpp:92:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ambuscada.in", "r", stdin); ^ user.cpp:93:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ambuscada.out", "w", stdout); ^