Is there a good example of how toupper() works?

[Jeffrey T. Hutzelman]

No.  In ANSI C, toupper is required to leave the character alone if it
is not lowercase.
-----------------
Jeffrey Hutzelman
America Online: JeffreyH11
Internet/BITNET:jh4o+ at andrew.cmu.edu, jhutz at drycas.club.cc.cmu.edu,
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