An array is not strictly required to solve this.
You already have the mechanism to extract the last digit from a number. You just need to extend this by using use division to "shift" the digits the required number of places.
For example, if you have the number
1234, to get the second digit you can divide by
10, to get
123 mod 10 will give you the digit
To get the third and fourth digits you would just need to divide by
Note the pattern here. To get the digit at position 2 you divide by
100, which is
10 raised to the power of
2, or (
10 to the
3 or (
10^3), and so on.
Or more succinctly, you can expose the nth digit by dividing by the nth power of
Another different solution would be to use
sprintf to convert the number into a string. This hasn't been covered yet at this point in the course, but if you have some prior experience (or are feeling brave) then you might want to try that approach. Use
man sprintf from the command line to see how this might work.