You're seeing the difference between a signed char and an unsigned char (why does C say char can have a sign? who knows). Bitwise, they are the same value: http://en.wikipedia.org/wiki/Two%27s_complement
It's worth noting that man 3 getopt (first point of call) tells you that -1 is returned when there are no more options to pass and that getopt() returns an 'int', not a 'char'.
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branchandroot
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Date: 2008-08-05 04:27 am (UTC)It's worth noting that man 3 getopt (first point of call) tells you that -1 is returned when there are no more options to pass and that getopt() returns an 'int', not a 'char'.