std::vector и push_back, emplace_back

#include <iostream>
#include <iomanip>
#include <string>
#include <vector>
using namespace std;
class Person {
public:
    Person() : id(0), salary(0), name("-") {
        puts("Call Person()");
    };
    Person(const int id, const double salary, const string& name)
        : id(id), salary(salary), name(name) {
        puts("Call Person(const int& id, const double& salary, const string& name)");
        ++copying;
    }
    Person(const Person& p)
        : id(p.id), salary(p.salary), name(p.name) {
        puts("Call Person(const Person& p)");
        ++copying;
    }
    ~Person() {
        puts("Call ~Person()");
        if (this->id) cout << "\t" << *this << '\n';
        cout << "\tCopying: " << copying << '\n';
        cout << "\tMoving: " << moving << '\n';
        cout << "\tDestruction: " << ++destruction << '\n';
    }
    // Закомментировать два конструктора и перекомпилировать
    Person(int&& id, double&& salary, string&& name)
        : id(id), salary(salary), name(move(name)) {
        puts("Call Person(int&& id, double&& salary, string&& name)");
     ++moving;
    }
    Person(Person&& p)
        : id(p.id), salary(p.salary), name(move(p.name)) {
        puts("Call Person(Person&& p)");
     ++moving;
    }
private:
    int id;
    double salary;
    string name;
    static unsigned copying;
    static unsigned moving;
    static unsigned destruction;
    friend ostream& operator<<(ostream& out, const Person& p) {
        return out << p.id << ' ' << left << setw(16) << p.name << ' ' << p.salary;
    }
};
unsigned Person::copying = 0U;
unsigned Person::moving = 0U;
unsigned Person::destruction = 0U;
Person sidorov() {
    return { 28042, 128304.02, "Sidorov S. P."s };
}
Person antonov() {
    return { 28063, 173589.13, "Antonov G. N." };
}
int main() {
    const char* s = "--------------------------------";
    vector<Person> persons;
    Person ivanov{ 28074, 147235.26, "Ivanov I. G."s };
    Person petrov{ 28055, 152477.29, "Petrov A. V." };
    persons.emplace_back(ivanov); // 1
    persons.emplace_back(petrov); // 2
    puts(s);
    persons.emplace_back(antonov()); // 3
    persons.emplace_back(sidorov()); // 4
    puts(s);
    persons.emplace_back(28002, 140038.07, "Gavrilov A. A."s); // 5
    persons.emplace_back(28104, 122033.48, "Tarasov S. Z."); // 6
    puts(s);
    persons.push_back({ 28127, 104305.07, "Stepanov D. O."s }); // 7
    persons.push_back({ 28099, 137011.22, "Prokhorov F. I." }); // 8
    puts(s);
    int id = 28111;
    double salary = 161304.58;
    string zakharov = "Zakharov U.L.";
    persons.push_back({ id, salary, zakharov }); // 9
    persons.emplace_back(id, salary, zakharov); // 9
    puts(s);
    Person Zakharov{ id, salary, zakharov }; // 9
    persons.push_back(Zakharov);
    persons.emplace_back(Zakharov);
    puts(s);
    Person empty; // 10
    puts(s);
    for (const auto& record : persons) cout << record << '\n';
    puts(s);
    empty.~Person();
    puts(s);
    system("pause > nul");
}