Base Before Derived, Derived Before Base

1#include <iostream>
2using namespace std;
3 
4class Animal {
5public:
6    Animal() { cout << "Animal()" << endl; }
7    ~Animal() { cout << "~Animal()" << endl; }
8};
9 
10class Dog : public Animal {
11public:
12    Dog() { cout << "Dog()" << endl; }
13    ~Dog() { cout << "~Dog()" << endl; }
14};
15 
16int main() {
17    cout << "start" << endl;
18    {
19        Dog d;
20        cout << "have a dog" << endl;
21    }
22    cout << "end" << endl;
23    return 0;
24}