How to convert an arbitrary large integer from base 10 to base 16?

Question

The program requires an input of an arbitrary large unsigned integer which is expressed as one string in base 10. The outputs is another string that expresses the integer in bas

Answer 1

Here's a BigInt library:

http://www.codeproject.com/KB/cs/BigInt.aspx?msg=3038072#xx3038072xx

No idea if it works, but it's the first one I found with Google. It appears to have functions to parse and format big integers, so they may support different bases too.

Edit: Ahh, you're using C, my mistake. But you may be able to pick up ideas from the code, or someone using .NET may have the same question, so I'll leave this here.