Re: Lost information converting decoded value to in32_t

[Riccardo Mottola]

Hi,

Wolfgang Lux wrote:
> Well, you've missed out the one that should have worked:-)
>   -2147483648LL
> Note that suffix L mark a long value, which is just 32 bits on a 32-bit system 
> the long type. So to get a 64-bit literal you need to ask for a long long value.


ah yes! At first I didn't think of it because LL is not in the K&R book 
I have. I tested that afterwards... however I think the other solution I 
propose is somehow "smarter" not rerquiring to use a bigger type, since 
we need to do a comparison and not just represent the absolute value.

I myself find it confusiong that "-123" is not the literal, but it is 
essentially "0" - "123", I would have expected to be able to really 
represent a negative number if I have a signed type. This is not 
specified in K&R but is an explanation which explains well the whole 
thing. Maybe with a paarenthesis or some other notation I'd like to be 
able to directly represent that number. The "trick" of (-2147483647 -1) 
is nasty but works :-)

Riccardo