Re: [Dev-C++] OT signed/unsigned

[<go...@fo...>]

One bit is consumed by the sign (+ or -) which means that if the
variable is signed it's maximum absolute value is "about" half that of a
corresponding unsigned variable. An example explained the "about":
Two bit integer
00 01 10 11

unsigned
this would be:
0 1 2 3

signed
assuming MSB contains the sign and + <-> 1 this would be:
-0 -1 +0 +1 but since we only need one zero one normally does something
like this:
-1 0 +1 +2 that is -0 is taken to mean +2 and +0 is taken to mean 0
hence the "about".






Erik Schmidt skrev:
> what's the difference between a signed and unsigned variable
> 
> 
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