main.cpp

#include <iostream>
#include <map>
#include <string>
#include <vector>

using namespace std;
 
class Object
{
  public:
    Object();
    ~Object();
};

Object::Object()
{
}

Object::~Object()
{
}

class Connection
{
  public:
    Connection(Object _obj);
    ~Connection();
    Object * obj;
    void status();
};

Connection::Connection(Object _obj)
{
  obj = _obj;
}

Connection::~Connection()
{
}

void Connection::status()
{
  cout << obj << endl;
}


int main() {
  Object * myObj = new Object();
  
  Connection * myConn = new Connection(myObj);
  
  delete myObj;
  myObj = NULL;
  
  cout << myObj << endl;
  myConn->status();
  /*
  Ausgabe ist:

  0
  0x25ec010

  sollte aber:

  0
  0

  sein.
*/
}