bruteforce

#include <iostream>
#include <fstream>
#include <string>
#include <ctime>
using namespace std;

int main()
{
    const string s = "0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM";
    const short aSize = 62;
    const short pSize = 8;
    string pass = "00000000";
    ofstream out ("t.txt");

    out << pass << endl;

    time_t now = time(0);

    for (int j = 0, c = 0; j < pSize; ++j)
    {
        if (pass[j] != s[aSize-1])
        {
            for (short h = j - 1; h >= 0; --h)
                pass[h] = s[0];

            pass[j] = s[s.find(pass[j]) + 1];
            out << pass << endl;
            j = -1;
            ++c;
        }

        if (time(0) - now > 1)
        {
            cout << c << " passwords per second" << endl;
            c = 0;
            now = time(0);
        }
    }
}