What's the smartest SDL coding option to replace what might have been done
with persistent variables?
1) Recalculating the events of frames 1 to n-1 for every nth frame;
2) writing to disk each time there's an event that needs to be remembered.
Q: What happens however upon each re-opening of a file-- will the old
material that's in the file be discarded, or are newly written records
appended at the end?
