Question

basically I want to return the number of digits in the int -> values like this:

(int)1 => 1
(int)123 => 3
(int)12345678 => 8

I know nothing about C, so please bear with me. I know objective c, but I use ints and floats instead of NSNumbers. I realise I could convert the ints into objective c objects, but this seems faffy, and if I can do it with C I’ll know it for the future.

Thanks

Answer 1

use

int d = (value == 0 ? 1 : (int)(log10(value)+1));

Note that this doesnt work for negative numbers, you’ll have to use

int d = (value == 0 ? 1 : ((int)(log10(fabs(value))+1) + (value < 0 ? 1 : 0)));

which adds 1 for the minus sign, if value is negative.