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  1.  Home
  2. RPG400-L
  3. October 2003

Re: Help with parameter passing

Andy Holmer wrote:
> >
> > One of the functions is passing tax_amt and tax_rate as
> >
> > double *pTransTotalTax,
> > double *pTransCombRate,
> 
> This c function is actually asking for a pointer to a double.  Note the
> asterisk just before the variable name.

"double *" can be read in two ways:
1. pointer to a double
2. double passed by reference
3. array of double (oops, three ways)

The first two mean the same thing at the machine level, but they don't
mean the same thing to RPG, since RPG doesn't have the concept of
"pointer to a double".  So I think the original 8F (with no VALUE
keyword) is a more correct RPG translation than * (with the VALUE
keyword).

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