关于容器中包含类和容器中是否有指针的有关问题

#include <iostream>
#include <vector>

using namespace std;
class cb{
public:
    vector<int> cb_v;
};
class ca{
public:
    vector<class cb> ca_v;
};
int main()
{
    class cb obb;
    
    class ca oba;
    cout << " 为赋值之前的大小：obb 大小" << sizeof(obb) << endl;
    cout << "oba的大小："  << sizeof(oba) << endl;
    vector<int> vb_temp;
    for(int i = 0; i < 10; i++)
    {
        vb_temp.push_back(i);
        obb.pb_v = vb_temp;
        cout << &obb.pb_v << " " << &obb.pb_v[0] <<endl;
    }
    cout << " boa.ca_v[i] ";
    for(int i = 0; i < 100; i++)
    {
        oba.ca_v.push_back(obb);
        cout <<&oba.ca_v<< " " << &oba.ca_v[0] << " "<< &oba.ca_v[0].pb_v[0] <<endl;
    }
    cout << " 为赋值之后的大小：obb 大小" << sizeof(obb) << endl;
    cout << "oba的大小："  << sizeof(oba) << endl;
    
    return 0;
}