Thomas de Groot schrieb:

> Also you can 
> simplify your define as you do not need the #if statement. Just write:
> 
> #while (defined(inputfile))
>   #declare x1 = y1;
>   #declare x2 = y2;
>   #declare x3 = y3;
>   #read (inputfile, y1, y2, y3)
>   ....
>   ....
>   #write (outputfile, x1,", ", x2,", ", x3,",","\n")
>   ....
> #end

I guess without the pre-read this will cause a parse error, as y1,y2,y3 
will be undefined at this point.

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