Take care of your member reference variables

reference-member-is-dangerous.cpp

#include <iostream>
#include <string>

class Person {
    public:
        Person(std::string& reference): _reference(reference) {}
        std::string name() { return _reference; }
    private:
        std::string &_reference;
};

Person* callMeMicky(Person* person) {
    std::string name("micky");
    person = new Person(name);
    if (!person) {
        std::cout << "failed to make you micky" << std::endl; 
    }
    return person;
}

int main() {
    Person *mick = NULL;
    mick = callMeMicky(mick);
    if (mick) {
        std::cout << "callMeMicky: " << mick->name() << std::endl;
	std::cout << "above name does not exist since its reference is destructed after callMeMicky returned" << std::endl;
    }
    return 0;
}