On Sep 22, 2004, at 11:31 AM, Catherine Moroney wrote:
> I tried to code something like an "i++" operator, but ran up
> against the constraint that the input to any user-defined operator
> has to be strictly intent(in). So, the value of the input argument
> is never changed and i++ doesn't work. Is there any way around this?
No. This is a pretty fundamental philosophical difference between
C and Fortran. C is full of side effects. Fortran tends not to be.
Fortran operators produce outputs; they don't modify their inputs.
You can write an increment subroutine, but of course, you can't
then call that subroutine in the middle of an expression.
> Is the
> 'USE MISC_UTILITY, ONLY: .PP' syntax ok?
No. You need
USE MISC_UTILITY, ONLY: operator(pp)
--
Richard Maine | Good judgment comes from experience;
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| -- Mark Twain
