If you mean "I want a zero in the least significant digit position" then try this:
int digits = log10(num) + 2;
sort = 0;
int temp = num;
while (digits-- > 0)
{
int d = temp % 10;
temp /= 10;
sort = sort * 10 + d;
}
If you don't, then you will need to explain in a lot better detail!