I'm trying to figure out how to subtract one array of integers from another. I have figured out how to add 2 together going digit by digit and carrying over. I have no idea how to go about subtracting one from another. Basically i want to do simple calculations on numbers that long long wouldn't hold. I also want to do it using the standard library.
Does anyone have any hints on how to start or a link to a tutorial?
Any help is most appreciated.