gistfile1.cpp

#include <cstdio>
using namespace std;

class Container;
class Element;

class Container {
  private:
    Element *container[100];
    int i;
  public:
    Container() {
      i = 0;
    }
    void add(Element *e);
};

void Container::add(Element *e) {
  container[i] = e;
  i++;
}

class Element {
  private:
  public:
    Element(Container _container) {
      Container container = _container;
      container.add(this);
    }
};

int main() {
  Container c;
  Element* e1 = new Element(c);
  Element* e2 = new Element(c);
}