Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!fluke!ssc-vax!dmg
From: dmg@ssc-vax.UUCP (David Geary)
Newsgroups: comp.lang.c++
Subject: Re: deallocating an array of objects
Message-ID: <2735@ssc-vax.UUCP>
Date: 19 Jun 89 17:40:27 GMT
Organization: Boeing Aerospace Corp., Seattle WA
Lines: 45


In article <9500@alice.UUCP>, Jonathan Shopiro writes:
+ In article <1245@cadillac.CAD.MCC.COM>, rpj@redcloud.cad.mcc.com (Rich Johns) writes:
+ - 
+ -  Assume:
+ - 
+ - class Foo {
+ -  Foo() { /*stuff*/}
+ -  ~Foo() { /* stuff*/}
+ - };
+ - 
+ - main() {
+ -  Foo** fooArray = 0;
+ -  fooArray = new Foo*[100];  // fooArray points to 100 uninitialized pointers
+ - 
+ - // do something
+ - 
+ - }
+ - 
+ - My question has to do with deallocating fooArray. If I am not concerned with...

+ - delete [100]fooArray;
+ This works too, but it doesn't delete the pointed-to Foos.
+ - 
+ - or would I have to:
+ - 
+ -   for (int i = 0; i < 100; i++) {
+ -     delete fooArray[i];
+ -   }

+ This deletes the pointed-to Foos (and they better be there to delete)
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  If the pointed-to Foos are not there, and each element of FooArray
is NULL, will 

delete fooArray[i];

do any harm?  I was under the impression that delete, when applied
to NULL does nothing.
-- 
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~ David Geary, Boeing Aerospace, Seattle                 ~ 
~ "I wish I lived where it *only* rains 364 days a year" ~
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