Why this code doesn't crash ?

[Dhafir]

Hi,
Car* myCar = new Car();
delete myCar;
mayCar->start();// assume class Car has a start() method

Why after deleting myCar I was still able to dereference it without problem?

Dhafir

 

[Zyrenthian]

My only guess is that the memory was only marked as being deleted but that space had not yet been used. For some freak of nature (or compiler) it worked. I would say never trust it but because you do it so fast after the delete, the memory is still good. Remember I can always say

CObject* pObject;
pObject->IsKindOf(RUNTIME_CLASS(MyObject));

Because I dont set pObject to null, it runs, compiles and crashes. In your case, the address was valid. Try AfxAssertValidAddres on the pointer (I think that is the name of it.. i know validaddress is part of it)

matt

 

[Cagliostro]

Car* myCar = new Car();
delete myCar; //below you have mayCar, not myCar as here
mayCar->start();// Ion Filipski

filipski@excite.com

 

[Dhafir]

it is a typo error
Thanks