Assign integer value to letter

Question

So i have this problem. I have Text Box with text containing 12 numbers. So for example 012345678912. Now i don\'t know how to assign the first, then the second .... and so

Answer 1

int x = int.Parse(txtNumbers.Text);

int a[12];
for(int i=0;i<12;i++)
{
    a[i] = x %12;
    x = x/10;
}