From: "Steven Smith" <sos22@cam.ac.uk>
To: Jonas Appel <jonas.appel@jonas-appel.de>
Cc: linux-c-programming@vger.kernel.org, sos22@srcf.ucam.org
Subject: Re: Calculating 64-Bit Values
Date: Thu, 13 May 2004 15:30:47 +0100 [thread overview]
Message-ID: <20040513143047.GA5370@archibold.chu.cam.ac.uk> (raw)
In-Reply-To: <1084456108.802075@slbhw0>
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> typedef unsigned long long int64;
>
> int64 val = 0x7c95674beb4000;
Try:
int64 val = 0x7c95674beb4000ll;
gcc won't generate a long long constant unless you explictly tell it
to; it tries to stuff the whole thing into 32 bits, which doesn't
really work.
Incidentally, you might want to pick a different name for your typedef
-- int64 is usually signed.
> And printing the value works like this:
>
> printf("Value: %8lx%8lx\n", timestamp[0], timestamp[1]);
printf("Value: %llx", timestamp);
should work. You may need %qx instead of %llx on some really old
systems, or conceivably %Lx.
Steven Smith.
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prev parent reply other threads:[~2004-05-13 14:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-13 13:49 Calculating 64-Bit Values Jonas Appel
2004-05-13 14:30 ` Steven Smith [this message]
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