Hi Can I ask how range checking would be turned off? In the project settings for compiler-runtime settings it is checked, and I cant see any compiler directives anywhere. BTW I tried with range and overflow checked and unchecked but i still get the exception when it runs.
Thank you for the tip concerning borland newsgroups! Pete --- In [email protected], Rob Kennedy <[EMAIL PROTECTED]> wrote: > > petesouthwest wrote: > > In the working app I get: > > (Byte(Result[I]) + Seed) * Word(C1) + Word(C2)=1763724594 > > > > and seed gets assigned 19762 > > > > while in my new app that raises an exception with 'range check > > error' > > If you have range checking turned on (check your compiler options) then > an ERangeError exception is exactly what you should get. A Word variable > can't hold a value of 1.7 billion. > > > My delphi help says that the range of a word is 0..65535, so I would > > have thought neither example should run. > > > > So I dont understand why this works, or why the test app assigns seed > > a value of 19762 while my other app creates an exception. > > Range checking it probably only enabled in one of the programs. > > You have three options: > > 1. Turn off range checking for the whole program. I don't recommend this. > > 2. Turn off range checking only for the line that's giving you trouble, > like this: > > {$R-} > Seed := (Byte(Result[I]) + Seed) * Word(C1) + Word(C2); > {$R+} > > 3. Type-cast the expression to Word: > > Seed := Word((Byte(Result[I]) + Seed) * Word(C1) + Word(C2)); > > > I've tried posting on the Borland newsgroups in the hope that the chap > > from teamB can explain it to me, but not had an answer. > > This might explain why: > > http://www.cs.wisc.edu/~rkennedy/borland-newsgroups > > -- > Rob > ----------------------------------------------------- Home page: http://groups.yahoo.com/group/delphi-en/ To unsubscribe: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/delphi-en/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
