Dynamic Memory

given

Code:

---

int main()
{
        stack<MyClass *> s;
        MyClass *m;
        int i;
       
        for(i = 0; i < 5; i++)
        {
                m = new MyClass;
                //.... some code dealing with m
                s.push(m);
        }
       
        while(!s.empty())
                s.pop();
       
        return 0;
}

---

is there still 5 MyClasses's on the heap?

in other words, will the stack (container) clean up for me or not?

Quote:

---

is there still 5 MyClasses's on the heap?

---

Yes, the stack container only manages the memory needed to store the addresses of the MyClass objects. Whether the addresses are heap or stack addresses, it doesn't care.

Quote:

---

in other words, will the stack (container) clean up for me or not?

---

No, you will have to delete the MyClass objects yourself.

Make simple test like this one:

Code:

---

#include <cstdlib>
#include <iostream>
#include <stack>

using namespace std;

class MyClass
{
      public:
            MyClass()
            {
                      cout<<"Costructor"<<endl;
            }
            ~MyClass()
            {
                      cout<<"Dectructor!"<<endl;
            }
           
};

int main()
{
        stack<MyClass *> s;
        MyClass *m;
        int i;
       
    for(i = 0; i < 5; i++)
        {
                m = new MyClass;
                //.... some code dealing with m
                s.push(m);
        }
       
        while(!s.empty())
                s.pop();

        system("pause");
        return 0;
}

---

As you can see only constructors are called, but none destructor, that simply means object are created (on heap by calling operator new) but not destroyed.
Hope this helps.
Cheers!

Micko