The variable passed to the function is not set to the value assigned to it

To return the i-th digit to the left of a given number, I created this function:

int ith(unsigned long x, int i)
{
    int count=0;
    unsigned long y = x;

    do
    {
        y /= 10;
        count++;
    } while (y > 0);
    if (i > count)
        return -1;
    count -= i;
    while (count > 0)
    {
        x /= 10;
        count--;
    }
    return x % 10;

}

      

        
        
        
      

    

However, when the input for the function is 2.2. It took a long time for the function to be Finnish; so I looked in the debugger and noticed that count==54353453

and count

never get 0

which I assigned to it.

EDIT Here the rest of my code, as some of the suggested ones, might be the source of this error.

int main()
{
    int x, i,result;
    do
    {
        printf("Enter a number and the digit you want to retrieve.\nEnter a negative number to exit\n");
        scanf("%ul %d", &x, &i);
        if (x<0)
        {
            printf("Operation Aborted.. Exiting....\n");
            break;
        }
        else
        {
            result = ith(x, i);
            if (result == -1)
            {
                printf("Error: There are no such amount of digits to retrieve from that location\n");
                continue;
            }
            printf("The %dth digit of the number %ul is %d\n", i, x, result);
        }

    } while (x >= 0);
}