所以我正在学习操作重载。我试图重载〈〈来打印对象属性。在我的例子中，Properties是一个继承了person类的public部分的类。这是我所拥有的：

class Person {
    private:
        string name;
        int egn;
        string adress;
    public:
        friend ostream& operator << (ostream& out, const Person& c);
    }

    ostream& operator << (ostream& out, const Person& c)          
    {
        out << "Person name: " << c.name << "\n" << "Person egn: " << c.egn;
        return out;
    }
    int main()
    {  
        Properties* person_obj_1 = new Properties();
        person_obj_1 = add_person(person_obj_1);//Add some values 
        cout << person_obj_1 << "\n";
    }

而我得到的输出是000001CE89252130，这不是我想要的，我需要打印我的属性的实际值，我做错了什么？