Re: Beginner's questions

[marcoschmidt@geocities.com (Marco Schmidt)]

On Sun, 02 May 1999 19:15:01 GMT, Matthew Heaney
<matthew_heaney@acm.org> wrote:

Thanks for your answer.

>> 1) I couldn't find out how to use bitwise operations "and" and "or"
>> (which would be "and" / "or" in Pascal and "&" / "|" in C). Do I have
>> to include a certain package?
>
>Those operations predefined for all modular types.  Were you using an
>integer type?

Yes, but I want to use "and" and "or" for bitwise manipulation, not
logical operations which evaluate to boolean. I want to fill an array
of 64 Integer values with the number of "on" bits in the numbers 0 to
63, so the resulting array should look like this:

index : value
-------------
0 : 0
1 : 1
2 : 1
3 : 2
4 : 1
5 : 2
and so on. It's a lookup table I want to use in another part of the
program.

In Pascal, logical and bitwise operators have the same name (and /
or), while there are different operators in C, C++ and Java (& and &&,
| and ||). I need the & and | version.

Regards,
Marco