In my program, I am using BitArrays to represent 160 bit numbers. I want to be able to add, subtract, increment and decrement these numbers, what is the algorithm for doing this?
At the moment I'm not interested in multiplication and division, but I might be in the future so bonus points for that.
I'm implementing in C#, but pseudocode is fine if you're not familiar with the language
Since you are using C#, you might want to take a look at BigInteger which was added to the recently released .NET 4.0.