C++ ile brute Force password cracker nasıl yapılır?

#include <time.h>

#include <iostream>

using namespace std;

int main(int argc, char *argv[])

{

    system("color a");

    srand(time(NULL));

    string sifre;

    string alp[39] = {"a", "b", "c", "ç", "d", "e", "f", "g","h", "i", "j", "k", "l", "m", "n", "o", "ö", "p", "r", "s", "t", "u", "ü", "v", "y", "z", "x", "w", "q", "1", "2", "3", "4", "5", "6", "7", "8", "9", "0"};

    while (true)

    {

        cout << "sifrenizi yaziniz :";

        cin >> sifre;



        while (true)

        {

            int s1 = rand() % 39;

            int s2 = rand() % 39;

            int s3 = rand() % 39;

            int s4 = rand() % 39;

            //int s5 = rand() % 42;

            string pass = alp[s1] + alp[s2] + alp[s3] + alp[s4]; //+ alp[s5];

            cout << pass << endl;

            //system("clear");

            if (pass == sifre)

            {

                cout << endl

                     << "sifre kirildi :" << pass << "\n\n";

                break;

            }

        }

    }

}