[Info-vax] DCL Integer Overflow

[Scott Dorsey]

 <VAXman-  @SendSpamHere.ORG> wrote:
>In article <oj8oc5$8s5$1 at panix2.panix.com>, kludge at panix.com (Scott Dorsey) writes:
>>On 6/30/2017 5:06 AM, GerMarsh wrote:
>>> I know that there have been a few discussions about
>>> enhancing/replacing DCL, but I wonder if someone will fix the old
>>> integer overflow which has been there since the year dot...
>>> 
>>> $ int=%x7fffffff
>>> $ sho sym int
>>>    INT = 2147483647   Hex = 7FFFFFFF  Octal = 17777777777
>>> $ int=int+1
>>> $ sho sym int
>>>    INT = -2147483648   Hex = 80000000  Octal = 20000000000
>>
>>This is not a bug, it's a feature.
>>If you don't want it to roll over, what DO you want it to do?
>>Halt with an error?
>
>Halt and Catch Fire!
>
>In need of real math?  Use Fortran!

Fortran doesn't allow me to pitch an exception on integer overflow either,
does it?  I can do it on a float, but with integers I need to check explicitly
before every operation.
--scott

-- 
"C'est un Nagra. C'est suisse, et tres, tres precis."