Date:	Thu, 8 May 1997 15:41:37 -0400
From:	Bryan Murphy <bryan AT hcst DOT com>
Subject:	long long int assignments
To:	djgpp AT delorie DOT com
Message-ID:	<Pine.3.89.9705081555.A32279-0100000@alpha.hcst.com>
MIME-Version:	1.0

I have a sequence of assighments that follows like this:

unsigned long long int millimeters = (unsigned long long int)-1;
unsigned long long int centimters  = millimeters / 10;
unsigned long long int meters      = centimeters / 100;
unsigned long long int lightspeed  = 96100000000000000;
etc. etc.

The whole idea was to see how much space could be accurately modeled
down to a millimeter's accuracy.  I came up with about 1.9 light
years (quite a bit!!).

Anyways, if I don't type cast centinal values when assigning them to
long long int types, I get a warning telling me the value is out of
range, yet the long long int receives the value fine.  Any reason why
this happens and what can I do to stop the warnings short of typecasting
every big assignment?

Also, how well does a pentium handle long long ints vs. short ints, 
integers, and long integers in terms of speed?  Can I expect a 
substantial amount of overhead by using long long ints, or is it rather 
negligible?

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