Several of the errors mention that class IOBuffer has no member named "pack". The message is absolutely correct, it doesn’t; if you look at the header, it has a method named Pack, with a capital P. C++ is case-sensitive!
The errors about “redefinition” are happening because your include files don’t have include guards to prevent them from being included multiple times — you need to fix that.
That leaves only a few errors remaining; when you’ve got everything down to those last few, come back and talk to us again. This time, no images! No links! Just paste the actual text of the error message, and the few lines of code where the errors occur, and somebody will be able to help you.
solved Need some help with errors, culmination of a File System Project [closed]