Question about regrouping of operands

[The Invisible Man]

In article <16490001 at hpcllz2.HP.COM> walter at hpcllz2.HP.COM (Walter Murray) writes:
)Actually, as I read the proposed standard, ANSI C would seem to
)be _more_strict_ than FORTRAN.  For example, FORTRAN requires the
)expression X+Y+Z to be _interpreted_ as (X+Y)+Z, but explicitly
)permits it to be _evaluated_ as X+(Y+Z), even though the results could
)be different.  The proposed C standard seems to require that, in
)the absence of parentheses, both the interpretation and the 
)evaluation be done left-to-right.  Thus, in C, the expression
)X+Y+Z would have to be evaluated as (X+Y)+Z.

In the absence of parens, X+Y+Z can be evaluated in any order, including
(Z+X)+Y.  Furthermore, if the results are the same, (X+Y)+Z can be
evaluated as X+(Y+Z).  (unless they changed this at the April meeting :-)
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