Address of an object in C ++ and its members

I am working on one of the problems with my application. Here, the problem I am facing is some functions that I need to call using the pointer of a class object.

But the main problem is that I don’t have a class pointer with me, instead I have the value of a member variable (let's say its list of values). after that I did a little test with the code below.

using namespace std;

class Person {
public:
      Person(string name, int age) {
            this->name = name;
            this->age = age;
      }
      string getName() {
            return name;
      }
      int getAge() {
            return age;
      }
      void Print()
      {
      printf("This address is %x\n",this);
      printf("age adress is %x\n",&age);

      }
private:
      int age;
      string name;

};

int main() {
      cout << "Creating a person..." << endl;

Person *johnDoe=new Person("John Doe", 25);
      cout << "Person name: " << johnDoe->getName() << endl;
      cout << "Person age: " << johnDoe->getAge() << endl;
      johnDoe->Print();
      delete johnDoe;
      return 0;
}

Coutput Runtime:

> ./a.out
Creating a person...
Person name: John Doe
Person age: 25
This address is 72918
age adress is 72918

Now I doubt:

Is it guaranteed that the address of a member variable of a class always points to the address of an object? Can I use this address in case I need to use a pointer to call other basic api functions?

I saw this when I googled?

(C1x §6.7.2.1.13: " , , ... . , ." )

++ ?