long long

[w3r3w0lf]

hi!

can anyone explain this to me?
long long a;

what is this "long long"?? something like 8 byte variable (two longs) or
what?

thanks

[Jeff Schwab]

Re: long long

w3r3w0lf wrote:[color=blue]
> hi!
>
> can anyone explain this to me?
> long long a;
>
> what is this "long long"?? something like 8 byte variable (two longs) or
> what?[/color]

It's usually a sixty-four bit, signed integer type. It's a popular
extension.

[John Harrison]

Re: long long


"Jeff Schwab" <jeffplus@comca st.net> wrote in message
news:u7idnfH-r7o98Lvd4p2dnA@ comcast.com...[color=blue]
> w3r3w0lf wrote:[color=green]
> > hi!
> >
> > can anyone explain this to me?
> > long long a;
> >
> > what is this "long long"?? something like 8 byte variable (two longs) or
> > what?[/color]
>
> It's usually a sixty-four bit, signed integer type. It's a popular
> extension.
>[/color]

I believe its part of the C99 standard, so no longer a extension in the C
world. But ask in comp.lang.c to confirm.

john

[Ivan Vecerina]

Re: long long

"w3r3w0lf" <asff@asdf.asdf > wrote in message
news:c05q2d$j1r $1@ls219.htnet. hr...[color=blue]
> can anyone explain this to me?
> long long a;
>
> what is this "long long"?? something like 8 byte variable (two longs) or
> what?[/color]
- this type has been introduced in the 1999 C standard
- not in the 1998 C++ standard, but expected to be part of the next one.

"long long" is an (at least) 64 bit integer,
just as "long" is at least 32 bits.

From the 99 C standard, 5.2.4.2.1:
minimum value for an object of type long long int

LLONG_MIN -922337203685477 5807 // -(263 - 1)

- maximum value for an object of type long long int

LLONG_MAX +92233720368547 75807 // 263 - 1

- maximum value for an object of type unsigned long long int

ULLONG_MAX 184467440737095 51615 // 264 - 1


hth-Ivan
--
http://ivan.vecerina.com/contact/?subject=NG_POST <- e-mail contact form