Re: absolute value of min_integer a negative number?

[Daniel Diaz]

This is "normal" since gprolog does not test for integer overflow. The same occurs with:

?- current_prolog_flag(max_integer,X),Y is X+1.
X = 268435455
Y = -268435456


Daniel


Dave Sworin a écrit :

I ran the following in gprolog 1.3.0.  (I typed this in by hand.)

--------------------------------------------------

| ?- current_prolog_flag(min_integer,MIN_INTEGER),X is abs(MIN_INTEGER).

 

MIN_INTEGER = -268435456

X = -268435456

 

yes

| ?-

--------------------------------------------------

Can someone check this on another computer?  I was working under Fedora Core 4,

using the kernel 2.6.11-1.1369_FC4smp on a Pentium 4 processor with

Hyper-Threading Technology.  I was pretty surprised to see the result of an absolute

value that is negative.

 

Dave

 

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