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From: fritz@urz.unibas.ch
Newsgroups: comp.lang.pascal
Subject: Re: Help Me!!! What's wrong with this simple problem?
Message-ID: <1990Nov29.111729.1194@urz.unibas.ch>
Date: 29 Nov 90 10:17:29 GMT
References: <527@shum.UUCP> <19956@oolong.la.locus.com> <28893@shamash.cdc.com> <1990Nov28.090232.2958@uwasa.fi> <1990Nov28.180310.3147@aftermath.waterloo.edu>
Organization: University of Basel, Switzerland
Lines: 52

In article <1990Nov28.180310.3147@aftermath.waterloo.edu>, nmouawad@water.uwaterloo.ca (Naji Mouawad) writes:
> In article <1990Nov28.090232.2958@uwasa.fi> ts@uwasa.fi (Timo Salmi) writes:
>>In article <28893@shamash.cdc.com> mpe@shamash.UUCP (Mike Ebsen) writes:
>>>What's wrong with this problem in Turbo Pascal 5.0...
>>>
>>>      Program test;
>>>      var
>>>        i : integer;
>>>        j : word;
>>>      begin
>>>        j:=3;
>>>        i:=j-10;
>>>        writeln(j,'     ',i);
>>>      end.
>>>
>>>My compiler tells me that the assignment of -7 into i (an integer) 
>>>is an error.
>>
>>Yes, but j-10 is a word, and you cannot assign a negative value to
>>to it.  As far as I know i := j - 10 puts the value of the
>>right-hand side into the left-hand side only after j-10 has been
>>calculated. 
>>
>>...................................................................
>>Prof. Timo Salmi        (Moderating at anon. ftp site 128.214.12.3)
>>School of Business Studies, University of Vaasa, SF-65101, Finland
>>Internet: ts@chyde.uwasa.fi Funet: gado::salmi Bitnet: salmi@finfun
> 
> Or it may be a bug in tp5.0 . I ran this program yesterday and
> I ran it today twice (with {$R+}) in tp5.5 and it ran like a
> charm. No syntax errors, no sweat.
> 
> Anybody out there with tp5.5 could confirm that ? Or is my
> version of tp5.5. a freak ?
> 

Sorry, but I cannot confirm that. My TP 5.5 tells me a 
range checking error when I try to compile the program
above with the compiler option {$R+}. Only by setting
it to {$R-} or by changing the compiler option in the
menu I can compile the program.
                           
Perhaps your menu option was RANGE CHECKING OFF and you
could compile the program without any problem. If you insert
{$R+} into the source code you must press F9 afterwards. Then
you will see the error message. If you just press Ctrl-F9 the
previously compiled program, which is still in memory, will be
run!!!



		Oliver Fritz, University of Basel, Switzerland


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