robin wrote:
>
> A summary of the discussion on extended precisions,
> and some observations.
>
> Using SELECTED_REAL_KIND, one can
> prepare library procedures that use a desired precision,
>
> e.g. SELECTED_REAL_KIND(6)
> or
> SELECTED_REAL_KIND(15)
>
> Such library procedures can be used portably, Fortran
> using an appropriate precision guaranteeing at least
> 6 and 15 digits.
Strictly speaking, SELECTED_REAL_KIND(15) is not portable:
the standard only requires a second REAL kind whose precision
is greater than default REAL (i.e. the DOUBLE PRECISION kind).
But nothing guarantees that this precision be at least 15.
Best regards
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My opinions are not necessarily those of CGG
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