Compilare: user.cpp: In member function ‘void Reader::Advance()’: user.cpp:30:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(b, 1, SIZE, fin); ^ user.cpp: In constructor ‘Reader::Reader(const char*)’: user.cpp:11:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(b, 1, SIZE, fin); ^