file I/O and arithmetic calculation

[Carlos Nepomuceno]

----------------------------------------
> From: denismfmcmahon at gmail.com
[...]
>> Dear all who involved with responding to my question - Thank you so much
>> for your nice code which really helped me.
>
> Hold on a sec? Someone posted code that gave the correct answer to a
> homework question?
>
> --
> Denis McMahon, denismfmcmahon at gmail.com

Not sure what she've asked, but mine certainly do what I think she've asked.