Compilare: user.cpp:42:23: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] InputReader in("eq.in"); ^ user.cpp: In member function ‘void InputReader::advance()’: user.cpp:37:52: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, BUFFER_SIZE, 1, file); ^ user.cpp: In constructor ‘InputReader::InputReader(char*)’: user.cpp:13:48: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, BUFFER_SIZE, 1, file); ^