Hello guys. I have to write a program imitating a simple banking system working on console. To be honest my only problem are libraries which may be useful, since i want to do this smart. The system should be able to do operations like withdrawal etc. (no problem) and it should save the data like acc numbers, balance etc to a binary file. Operating on file as such shouldn't be a problem (algorithms and so), but i'd like to learn some useful functions / libraries which can help me make it a bit smarter. I know that google doesn't hurt but when i tried to look this up all i got was links to basic operating on files, so no use for me.
I'd really appreciate every help .