The right frame displays pseudo-code for reading a JellyFish position file, "position.pos". 

The writing routine will be the opposite.

For example, to read the level, the example shows:

       ar >> w;       level = (int) w;

To write to file, use:

       ar << (WORD) level;

and so on.


JellyFish is written in C++ using Microsoft Foundation Classes (MFC). The classes CFile and CArchive are MFC classes, WORD is a Windows SDK data type.

What you'll have to do to be able to read from or write to a file, is first to create and open a CFile object.

The Open command needs to parameters: The file name and a flag specifying whether to read or to write.

After that, you also create and open a CArchive object.

Now you need four parameters for the Open command: A pointer to the CFile object, a flag specifying whether to read (load) or to write (store), an integer specifying the size of the internal file buffer, and a pointer to the same buffer.

In the end, after reading all data, the CFile and the CArchive objects must be closed.