Saving Game data algorithm,perhaps?

Anyone know if there is some type of algorithm to save game data? Such as for an RPG or something of the like. I'm having a little bit of trouble figuring out an efficient way of saving the data. Also, how could I make my own save file extension. I want a game to have it's own file save format so casual people who don't know anything about computers can't tamper with it, or corrupt their save. Maybe some type of xor encryption could dissuade most users? Thanks...Danke(for the germans) :D

Boost::serialization offers a very complete and portable solution. However, if you are using MinGW it will not work for you :( There's still a somewhat big number of fail occurrences on their regression tests.

You may also want to take a look at Eternity http://www.winghands.it/prodotti/eternity/overview.html

You may also want to start here http://www.parashift.com/c++-faq-lit...alization.html and understand what is involved in writing your own model.