Re: 64 bit programming questions

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"Carl Nettelblad" <cnettel@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
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"D" <Dave@xxxxxxxxxxx> wrote in message
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Is it true there is no command line in 64 bit windows? So if I had a
basic c++ console app would I need to turn it into a windows form or mfc
app? Is there such a thing as just a process with out a window or message
switch simliar to a service but not one?

Whats the largest data type and is long double still aliased to a double?

Thanks

Programming questions are generally off-topic in this forum, but I guess
I'll answer both your general 64-bit questions and the more
programming-related ones.

For starters: There *is* a command line in 64-bit Windows. The only
confusion is probably caused by the fact that a lot of people still make
the connection "command line" <-> "MS-DOS". You can no longer run 16-bit
code in the existing Win64 variations, no matter if it's DOS or Win16.
cmd.exe is still alive and well. So is any 32-bit console application you
will compile.

Regarding data types, I think nothing has changed. There are, however,
compiler intrinsics (not-quite functions resulting in optimized assembler,
more or less) for overflowing multiplication of two 64-bit integers, for
example. These make for a higher performance handling of integers over 64
bits in size, but you will have to use library code for it, or roll your
own. There is no __int128 directly available.

/Carl
Sounds good, I can't wait to get a copy and start working with it, I need
larger data types currently. I wonder if you need to buy a 64 bit compiler
or if vs.net can compile for 64 with some switches set.

Thank you!!




.

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