Why does this not work?

**IlovePascal** · 13-02-2007, 12:34 AM

Hey, just a little question:
why does this not work?

Code:

if x<>xto then x += velocity*&#40; &#40;xto-x&#41;/AbsR&#40;xto-x&#41;&#41;;

with

Code:

Function AbsR&#40;x&#58;real&#41;&#58;real;
begin
     if x<0 then Result &#58;= -x;
end;

Cheers

PS: btw, is tht how u return a value for a function?

**Robert Kosek** · 13-02-2007, 01:17 AM

There is no += operator in pascal, that's why.

**IlovePascal** · 13-02-2007, 01:23 AM

Originally Posted by Robert Kosek

There is no += operator in pascal, that's why.

no,no, I always use that. Well, maybe in strict pascal there isn't, but the compiler accepts it...

**AthenaOfDelphi** · 13-02-2007, 03:08 AM

Because the return value of the AbsR function could be undefined.

You are setting 'Result' if x is less than zero, but what about if x is greater than or equal to 0?

Edit:- Just reworded this as the parser took out the less than and greater than symbols

**cragwolf** · 13-02-2007, 04:14 AM

So what if x is not less than zero, what do you think your function will return then?

**IlovePascal** · 13-02-2007, 05:56 AM

ops: duh!
well I'm really sorry about this! It's funny how sometimes we just don't see the obvious!
Maybe for the fact I haven't slept more than 10h in the last 60h or so...

Well good night, n this thread can be deleted!!! lol

Thread: Why does this not work?

Thread Tools

Display