[plt-scheme] Character problem

Hi Todd,

>  We have to read in RPN (reverse polish 
> notation) expressions from a text file, convert this RPN string to a 
> list, ...

Have a look at the first chapter of "How to Use Scheme",

<http://www.htus.org/Book/2001-11-13/howto-Z-H-3.html#%_part_I>

note especially "3.1  Pre-1958 Input and Output: The Lazy Approach":

<http://www.htus.org/Book/2001-11-13/howto-Z-H-5.html#%_sec_3.1>

-- 
Jens Axel Søgaard