Just create a game_state struct and write it to disk when the save is done. Most of your game state variables should be grouped together anyways so writing them to disk is as simple as using block writes to disk. The encryption comes from the fact that you open the file in binary mode so you won't be able to read what the value of a float is or certain values are in a text reader. You will be able to open the file in C but I see no harm in that.
You might also want to have a checksum in there some place, if you're really worried about someone editing it. Just sum up all the values of everything you write, and write that out along with it. It can be more complex than that, but that's a simple way. Then when you read everything in, sum them up again and compare it with said checksum. If they're different, someone's edited something. It's a very simple method, not really good, but simple enough.
You're not really going to stop anyone who really really wants to edit your save files.
Quzah.
Hope is the first step on the road to disappointment.
Hmm...I've just encountered another problem...how do I delete the old save/load txt file, so I can overwrite?
Just opening for writing will delete any contents of any existing file.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
oh nice - thx
