In message 54305.216.110.51.8.1080245554.squirrel@www.orkun.us you wrote:
I agree, unsigned char should be promoted to unsigned int.
Must, not should.
Agreed. Poor choice of words...
However, char can be unsigned or signed depending on the platform. On a
But the variable in question was of type "unsigned char", which leaves no room for implementation-specific behaviour.
In that case, compiler is generating incorrect code. Sign extension should not have been done.
with twos complement arithmetic. %02X can only suppress leaving zeros so additional f's will be printed.
Oops? %02X will _add_ leading zeroes if the result is too short, but it will never supress anything.
My bad. The thing that I was trying to say was that since char is promoted to int, 0's in the higher order 3 bytes will not be printed by %02X format specification but if any one of those higher order bytes was non-zero (as a result of sign extension) the output will overflow from the 2 character field.
[Maybe we should take this to c.l.c ;-)]
OK.
Best regards, Tolunay