#include <iostream>

#include <stdlib.h>
#include <vector>
using namespace std;

void generate(vector<int>& s, int& x, int& d)
{

    //Stores random digits 0-9 in a vector
    for (int i = 0; i < 12; i++)
    {

        s[i] = rand() % 10;
        s[i] = 0;
    }

    s[0] = 1;
    s[1] = 3;
    s[2] = 3;
    s[3] = 7;
    s[4] = 1;
    s[5] = 3;
    s[6] = 3;
    s[7] = 7;
    s[8] = 1;
    s[9] = 3;
    s[10] = 3;
    s[11] = 7;

    //Main algorithm
    for(int i = 0; i < 12; i++)
    {

        d = (2 * x) xor s[i];

        x = x + d;
    }
    x = x % 10;

    for(int i = 0; i < 12; i++)
    {

        if(i==4)
        {
            cout << '-' << s[i];
        }

        else if (i==9)
        {
            cout << '-' << s[i];
        }

        else cout<<s[i];
    }
    cout << x;
    x=3;

    d=0;
}
int main()
{
    srand(static_cast<int>(time(0)));

    vector<int> serial(12);
    int eax = 3;

    int edi = 0;
    int a;
    bool no_quit = true;


    cout << "Starcraft CD keygen\n";
    generate(serial,eax,edi);

    do
    {
        cout << "\nGenerate another one? (yes=1/no=0)";
        cin >> a;

        if (a==1) generate(serial,eax,edi);

        else no_quit=false;
    }
    while(no_quit);
    return 0;
}