On Thu, Oct 16, 2014, Himanshu Joshi wrote:
> When I redefine n=NULL before executing the wc_helix
> for molecule m2 again in the program it works fine,
>
> But I don't understand why it doesn't take the NULL value
> when I define it once.
nab uses the Fortran convention for passing arguments to subroutines: it
always passes arguments by reference, so they might be changed in the
underlying routine (wc_helix, in this case). You should print out "n" after
the first call, and see what is there.
If you want an empty string, use: n = ""; in place of n=NULL;
(although I guess the latter will work, but you are relying the details of how
the nab compiler implements strings.)
...hope this helps...dac
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Received on Thu Oct 16 2014 - 05:30:04 PDT
