Few basic c++ questions for x64

what is the range of the largest numeric data type available?

If I do this (on xp32)

__int64 g = 418235339844242000000;

I get

error C2177: constant too big

Will compiling on xp64 solve this?

I know Visual studio 2003 can compile for 64 when certain flags are set so I
think if I set those flags I should be able to compile but just not be able
to run it (unless I have xp64) . is that correct?


Next, is stl available for 64 bit development? I use a map to store those
large numbers.


Thanks alot !!!!

 

First of all the type is called int64_t, and you should not use __int64.
But why do you think the type is any different between xp 32bit and xp
64bit?

Yours problem is that the number needs more than 64 bit to store, you
you would need a 128 bit type. On some architectures (such as IA64), the
compiler may prodive such a type, called int128_t. But I don't think
AMD64 usually has it.

Note that you also have to postfix your constant with LL. Some compilers
do this for you, but that is not quite correct.

Sure, STL is part of the standard for years now.

Thomas

 

ok I apologize that I wasn't clear. I was trying to determine the largest
data type (and range) available on 64 bit machines. I wasn't aware of int128
but that or long long will suffice. Thanks