Silly Question?

[Rick Eames]

Okay, here it is:  I am writing a program which takes a text file and 
ouputs a concordance of the words in the file.  I have it working fine, 
however, I have problems with contractions:  (i.e. can't)  My question is 
this: does anyone have any good ideas for filtering every punctuation mark 
except contraction apostraphes?  I know how to do this in pascal, but not 
c.  Even in pascal, however, it is still kind of kludgy....

Rick Eames