[LC++]Smallest int -2147483648 or -2147483647?

[Paul Gearon]

On 4 Sep 2002, Dr Mark H Phillips wrote:

> int const minInt=-2147483648;
> 
> I get the error:
> 
> umbrella.h:43: warning: decimal integer constant is so large that it is
> unsigned
>
> Does that mean that the minimum is actually -2147483647, or does
> it mean that it is first reading (2147483648) and then applying the 
> minus, thus causing a problem.

No, you were correct the first time.  The minimum integer is indeed
-2147483648.  If you print out minInt you'll find that it gives you the
correct value, regardless of that warning.

> If the latter, how do I form a constant containing the minimum int?

Well what you're doing works, but since I don't like warnings I'd
initialise it with:

int const minInt = 0x80000000;

This gives the same result, without the warning.

Regards,
Paul Gearon