How to calculate negative binary??

How to calculate negative binary??

[Centaury]

Compilation error occurs when I entered the line :

p:=2# - 1010110 #

and is caused by the negative value of the binary. How to correct it?


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utopian@pl.jaring.my

Re: How to calculate negative binary??

[Mark A Biggar]

In article <01bc3bf9$a8a655e0$d87d8ea1@AaBbCcDd> "Centaury" <utopian@pl.jaring.my> writes:
>Compilation error occurs when I entered the line :
>p:=2# - 1010110 #
>and is caused by the negative value of the binary. How to correct it?

There is no such thing as a negative literal number in Ada, there is just
the negation operator applied to a positive literal.  This usualy makes
no difference as all compilers do the evaluation of the negation operator in
such a case at compile time, so what you want to write is:

p := -2#1010110#;

--
Mark Biggar
mab@wdl.lmco.com

Re: How to calculate negative binary??

[Tucker Taft]

Centaury (utopian@pl.jaring.my) wrote:
: Compilation error occurs when I entered the line :

: p:=2# - 1010110 #

: and is caused by the negative value of the binary. How to correct it?

   p := -2#1010110#;

No spaces are allowed between '#'s.  The minus sign goes out front,
and you need a semicolon at the end.  See the syntax for "based literals"
in RM95 2.4.2.

: -- 
: Please mail replies to :
: utopian@pl.jaring.my

I did that too.

-Tucker Taft   stt@inmet.com   http://www.inmet.com/~stt/
Intermetrics, Inc.  Burlington, MA  USA