vector or list?

An example:

Code:

---

#include <vector>
class atom
{       
public:
        atom(){}
};

class molecule
{
  std::vector<atom> theAtoms;

  public: 
        molecule()  {}
        void setAtoms(int i);       
        int getNumberOfAtoms() const { return theAtoms.size(); }
};

void molecule::setAtoms(int i)
{       
    theAtoms.resize(i);
}

int main()
{
  molecule m1;
  m1.setAtoms(4);  // 4 atoms
  molecule m2;
  m2.setAtoms(72); // 72 atoms
}

---

So exactly what is wrong with this? Isn't this what you're trying to acheive? Or maybe you can explain what your concerns are with the code that I posted (not what you initially posted).

Regards,

Paul McKenzie

Hi Paul,
Thank you for your comments about the code that I used. Infact that was just to get a view what "laserlight" wanted to express. Actually, I never compiled the code to check if I was wrong. Hence main function was just "bad". Then using friend class, that was to make use of private member in molecule class. I forgot I was doing a blunder. Finally, memory leaks, I take care of those when I write code and test the application.

Anyway, thanks to all for help. And you wont believe, it was very quick. :))