Hi I'm on my internship and my company told me that I've to implement password complexity using C language. The password must be Alpha numeric (eg h#ll0). Since I'm new to C , I found some difficulty. I google "password complexity in C " but no luck there. Can someone gave me some sample or explain me how to do it programmatically.
Thanks a lot in advance
Kevin
You don't provide enough information. By password complexity I assume you mean password strength.
I'm not in the business of writing code for someone, but if what you're looking to do is determine whether or not a password contains both a letter and a number, is at least n characters long, etc., C has functions you can do this with. isalnum(), isdigit(), and isalpha() come to mind for testing. These all return nonzero values to indicate true.
In terms of speed, C is fast on its own but remember with these that there is no need to parse the entire password -- all you need is for the function to return a nonzero value at some point. (All of these functions parse by character; C strings are char arrays.)
http://icecube.wisc.edu/~dglo/c_class/charfunc.html This is a good little reference for character parsing functions.