Reading from a file quickly
I'm trying improve my C++ connect four game by having it "learn" from its mistakes. To do this I'm gonna have it write to a file certain positions and how it handled them wrong so it doesn't make the same mistake twice. Since after awhile the number of positions will be increasing, I want the program to be able to read from the file quickly or else all of its calculations will get bogged down. Anyone know if there is a way to decrease file reading times, like possibly writing and reading in binary?