C++ - how to find the length of an integer

Question

I\'m trying to find a way to find the length of an integer (number of digits) and then place it in an integer array. The assignment also calls for doing this without the use

Answer 1

How about (works also for 0 and negatives):

int digits( int x ) { 
    return ( (bool) x * (int) log10( abs( x ) ) + 1 );
}