Re: little question once again
On Sun, 26 Sep 1999, you wrote:
> On Sat, 25 Sep 1999 22:37:06 -0400, Irv Mullins <irv at ELLIJAY.COM> wrote:
> >constant pi = 3.0 -- that's wrong, but I can change it!
> >
> That is true in Euphoria because Euphoria doesn't have real constants.
Bzzt! Sorry, that's the wrong answer. Euphoria will halt with this error
message:
may not change the value of a constant
pi = 3
> In C or C++ when you try to change a constant's value you will get a
> run-time error. In C++ you can only explicitly override the constant by
> using the const_cast operator.
Bzzt! again. (sort of) The whole purpose of constants is that they cannot be
programatically changed. A C++ constant is just a variable that's "hard" to
change. Pascal (Borland flavor) lets you change the value of constants even
easier, but at least the documentation says to thinkof them as "initialized
variables".
Irv
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