How to get the Nth digit of an integer with bit-wise operations?

Question

Example. 123456, and we want the third from the right (\'4\') out.

The idea in practise is to access each digit seperately (ie. 6 5 4 3 2 1).

C/C++/C# preferred.

Answer 1

value = (number % (10^position)) / 10^(position - 1)

Example:

number = 23846

position = 1 -> value = 6

position = 2 -> value = 4

position = 3 -> value = 8

Here is a simple Objective-C utility method to do this:

+ (int)digitAtPosition:(int)pos of:(int)number {

    return (number % ((int)pow(10, pos))) / (int)pow(10, pos - 1);
}