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  2. RPG400-L
  3. October 2003

Re: Help with parameter passing

"DeLong, Eric" wrote:
> 
> So far so good.  Now the problem.  The use of this api states:
> 
> "Total tax amount for the transaction. This parameter is used when
> processing special (tax-only debit and tax-only credit) transactions. This
> parameter is ignored if NULL is passed. Passing 0 results in zero tax being
> calculated."
> 
> Entended amount is fine, since we will have a calculated value for that
> every time we call the api.  But for the call to work properly, we must send
> the other parm as NULL.  How in the he!! am I supposed to do that?  Does C
> consider a parm to be null if the address is null?
> 

Eric, while the others' suggestion of changing the prototype to be a
pointer and passing *NULL will work, I think it's better to prototype it
as a float, with OPTIONS(*OMIT), and then pass *OMIT for null.

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