Doubt with object orientation on c++

[dianyu]

Hello, i have some doubts with c++.

First of all, if i have a map of objects like this:

class People {
    map<int,Person> mapPersons;
    string city;
    int code;

}

class Person{
    int id;
    string name;
    string phone;
}

When i want to delete the object Person of an instance of the mapPersons, it is correct the next form:

map<int,Person>::iterator iter=_socis.begin();
mapPersons.erase(iter);

or maybe i have to delete the object separately?

How can i delette an object of the class People?Do i have to delete the map first?

If i want to clear the content of a map, with the function clear() the objects will be destroyed like if i call delete to all the objects?

How can i destroy objects?

//created like:
Person p = Person()

//to destroy?
p.~person();

Everything thinking than the destroyers are like this:

~People(){

}

~Person(){

}

Thank you very much!!!

Imanol.