Trying to store objects in a vector

I'm quite new to C++ and I am trying to store objects inside a std::vector like this:

Event.h:

//event.hclass Event{public:    Event();    Event(std::string name);    ~Event();    void addVisitor(Visitor visitor);private:    std::vector<Visitor> m_visitors;};

Event.cpp:

//event.cppEvent::Event() :    m_name("Unnamed Event"){}Event::Event(std::string name) :    m_name(name){}void Event::addVisitor(Visitor visitor){    this->m_visitors.push_back(visitor);}void Event::listVisitors(){    std::vector<Visitor>::iterator it;    for(it = this->m_visitors.begin();it != this->m_visitors.end(); ++it)    {        std::cout << it->getName() << std::endl;    }}

Visitor.h:

//visitor.hclass Visitor{    public:    Visitor();    Visitor(std::string name);    ~Visitor();    std::string getName() const;    void listVisitors();    private:    std::string m_name;};

Visitor.cpp:

//visitor.cppVisitor::Visitor() :    m_name("John Doe"){}Visitor::Visitor(std::string name) :    m_name(name){}std::string Visitor::getName() const{    return m_name;}

main.cpp:

//main.cppint main(){    Event *e1 = new Event("Whatever");    Visitor *v1 = new Visitor("Dummy1");    Visitor *v2 = new Visitor("Dummy2");    e1->addVisitor(*v1);    e1->addVisitor(*v2);}

If I do it like this I would have to add a copy constructor which would make a deep copy so the object gets copied properly into the vector. I'm looking for a way around it by only storing pointers to the objects in a vector.I already tried it with std::vector<std::unique_ptr<Visitor> > m_visitors, but then I got some errors when calling addVisitor in main.cpp. Of course I changed the declaration of the class members accordingly.How would an appropriate declaration of the members and the member function look like to make it work?