Department class constructor and destructor

A destructor has the class name preceded by ~, takes no arguments and has no return type. It is called automatically when an object goes out of scope. For automatic (local) objects, destructors run in the reverse order of construction, since the stack unwinds last-in-first-out.

#include <iostream>
#include <cstring>
using namespace std;

class Department
{
    int id;
    char name[30];
public:
    Department(int i, const char *n)       // constructor
    {
        id = i;
        strcpy(name, n);
        cout << "Constructor: " << name << " (ID " << id << ") created\n";
    }
    void display()
    {
        cout << "ID: " << id << ", Name: " << name << endl;
    }
    ~Department()                          // destructor
    {
        cout << "Destructor: " << name << " (ID " << id << ") destroyed\n";
    }
};

int main()
{
    Department d1(1, "Computer");
    Department d2(2, "Civil");
    Department d3(3, "Electronics");
    d1.display();
    d2.display();
    d3.display();
    return 0;       // destructors run here
}

Output

Constructor: Computer (ID 1) created
Constructor: Civil (ID 2) created
Constructor: Electronics (ID 3) created
ID: 1, Name: Computer
ID: 2, Name: Civil
ID: 3, Name: Electronics
Destructor: Electronics (ID 3) destroyed
Destructor: Civil (ID 2) destroyed
Destructor: Computer (ID 1) destroyed

The objects d1, d2, d3 are created in that order but destroyed as d3, d2, d1, showing reverse order of destruction.