Hexadecimal to Decimal

[pcmang]

I dont know how to create the processing/return method for this :S

[Insectoid]

How would you do this on paper, mathematically?

[pcmang]

You dont know? Heres an example...not a good one tho. :S

http://www.ehow.com/how_5059936_convert-hexadecimal-decimal.html

[Insectoid]

I do know, I was asking if you know. I'm assuming you do, so it's just a matter of turning that into code.



The easiest way is to iterate over each element in the hex string (I'm assuming you're using a string for this) and search for that digit in a pre-defined array of elements 1-9, A-F (where each element is at the index corresponding to its decimal equivalent).

There are much better ways of doing it that allow any base -> any base, but for hex -> dec only it's faster to just hard-code in the array.