A Temporary Dies at the Semicolon

1#include <iostream>
2using namespace std;
3 
4class Box {
5    int m_id;
6public:
7    Box(int id) : m_id(id) { cout << "Create " << m_id << endl; }
8    ~Box() { cout << "Destroy " << m_id << endl; }
9    int id() const { return m_id; }
10};
11 
12int main() {
13    cout << "start" << endl;
14    cout << Box(7).id() << endl;
15    cout << "middle" << endl;
16    Box(8);
17    cout << "end" << endl;
18    return 0;
19}