Compilare: main.cpp: In constructor 'InParser::InParser(const char*)': main.cpp:20:47: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(BUFFER, SIZE, 1, input) ; ^ main.cpp: In member function 'char InParser::advance()': main.cpp:37:55: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(BUFFER, SIZE, 1, input) ; ^