Pin Code Finder (Finds your pin code)

#include "stdafx.h"
#include <iostream>

int main()
{
    using namespace std;
    cout << "Printing all pin codes!\n";
    for (int i = 0; i <= 9999; i++)
    {
        if (i < 10)
        {
            cout << "000";
            cout << i;
        }
        else if (i < 100)
        {
            cout << "00";
            cout << i;
        }
        else if (i < 1000)
        {
            cout << "0";
            cout << i;
        }
        else
            cout << i;

        if (i % 10 == 0)
            cout << "\n";
        else
            cout << " ";
    }
    cout << "\nDone!\n";
    return 0;
}