RE: signed or unsigned char

[Yves Rutschle <y dot rutschle at indigovision dot com>]

Hey,

> The char is being treated **unsigned** **by default** by the 
> compiler. I don't why this happened.

ANSI C doesn't define wether a char is signed or unsigned. Historically,
you find C compilers that treat it as signed, others treat it as
unsigned... based, I believe, on performance reasons (depending on
the underlying instruction set, one can be faster than the other for
some operations...)
Generally speaking, you can never assume the "signed-ness" of char
if you want your code to be portable.

Read http://www.arm.linux.org.uk/docs/faqs/signedchar.shtml for
a bit more on the subject.

Cheers,
signed Yves.

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