Class with pointers

[chikyu]

Hi everybody,

This is really a very nice forum.Congratulations to the creators and thanx to all partipants.
So my question is after having implemented a destructor like
Stream::~Stream()
{
delete [] nodes;
}

Do I need to call it in the main() function or is it automatically called by the system?

Thanx for your contribution

 

[Kartiksg]

The moment you instantiate a class, the constructor is called. Classes are also scoped and have a life. After its life time (when the function ends), the destructors are called automatically (unless you use new for which delete must be called appropriately).

Hope this helps

eg

int main()
{
Stream my_stream(/*...*/); //Your constructor
//...
return 0;
}
//Destructor automatically called Take it Easy
Kartik.S

 

[Zyrenthian]

Just a quick question... by nodes you dont mean you have a linked list. If nodes is an array then the above is the correct way to go but if it is a linked list then the above will not clear the memory.

Matt

 

[chikyu]

Thanx for your reply.
The class Stream is like this:
Stream{
private:
int NumOfNodes;
CPoint* nodes;
public:
Stream(int n);
...

};

somewhere I have an AllocNodes() function which does:
Cell= new CPoint[NumOfNodes];

That's why I was wondering if it's not necessary to call the destructor.

 

[Cagliostro]

The problem is what are destroyed automatically only objects. If you use pointers to objects, are destroied pointers as variables, but not also the objects which they point. So, do destruct you must explicitly delete YourObject; John Fill

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