Save your work in separate files for each class. Name , and name the files to the same name as the classes. Each ; each class should have a header file and a code file.

For example for the class [[#IO_Field | IO_Field]], create ''IO_Field.h '' and ''IO_Field.cpp''. The header file should hold the class declaration, and any other possible declaration related to the class. The "cpp" file should hold the definition (implementation) of the class, and its methods and possible functions.