Compilare: user.cpp: In member function ‘int nrxSegmentTree<TYPE>::updateTree(int, int, TYPE)’: user.cpp:268:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘int nrxSegmentTree<TYPE>::queryTree(int, int, TYPE)’: user.cpp:272:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘void inputReader::advance()’: user.cpp:18:48: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread( buffer, SIZE, 1, inputFile ); ^ user.cpp: In constructor ‘inputReader::inputReader(const char*)’: user.cpp:30:44: 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, inputFile ); ^