I'm having problems figuring out how to select and set digits within numbers.

For example, I want the user to enter a number:

"Enter Number" ? -> A (Int log A)+1 -> B

Above would be the start of the program. After this, I would like a line that selects, let's say the 4th digit in the number A and sets its value as C.

How can this be done?

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To clarify what I mean:

"Enter Number" ? -> A<-- User enters number, e.g 442

(Int log A)+1 -> B<-- This responds as how many integer digits the number has, in our case for 442, 3.

After this I want the second digit in 442 to be selected and set as C.

Hope you can help. Thank You.

Alf. <:3D~