atexit() function in C/C++

// C++ program to illustrate
// atexit() function
#include <bits/stdc++.h>
using namespace std;

// Returns no value, and takes nothing as a parameter
void done()
{
    cout << "Exiting Successfully"
         << "\n"; // Executed second
}
// Driver Code
int main()
{
    int value;
    value = atexit(done);

    if (value != 0) {
        cout << "atexit () function registration failed";
        exit(1);
    }
    cout << " Registration successful"
         << "\n"; // Executed First
    return 0;
}

// C++ program to illustrate
// more than one atexit function
#include <bits/stdc++.h>
using namespace std;

// Executed last, in a Reverse manner
void first()
{
    cout << "Exit first" << endl;
}

// Executed third
void second()
{
    cout << "Exit Second" << endl;
}

// Executed Second
void third()
{
    cout << "Exit Third" << endl;
}

// Executed first
void fourth()
{
    cout << "Exit Fourth" << endl;
}
// Driver Code
int main()
{
    int value1, value2, value3, value4;
    value1 = atexit(first);
    value2 = atexit(second);
    value3 = atexit(third);
    value4 = atexit(fourth);
    if ((value1 != 0) or (value2 != 0) or
        (value3 != 0) or (value4 != 0)) {
        cout << "atexit() function registration Failed" << endl;
        exit(1);
    }
    // Executed at the starting
    cout << "Registration successful" << endl;
    return 0;
}

// C++ program to illustrate
// atexit() function when it throws an exception.
#include <bits/stdc++.h>
using namespace std;

void shows_Exception()
{
    int y = 50, z = 0;
    // Program will terminate here
    int x = y / z;

    // Cannot get printed as the program
    // has terminated
    cout << "Divided by zero";
}
// Driver Code
int main()
{
    int value;
    value = atexit(shows_Exception);
    if (value != 0) {
        cout << "atexit() function registration failed";
        exit(1);
    }

    // Executed at the starting
    cout << "Registration successful" << endl;
    return 0;
}