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

// declare our own function here:
// (1) return type (int)
// (2) name of the function (roll_dice)
// (3) input parameters  OPTIONAL
int roll_dice()
{
    int d1 = rand() % 6;   // 0-5
    d1++;                  // 1-6

    int d2 = rand() % 6 + 1;  // 1-6

    int roll = d1 + d2;
    return roll;
}


int main()
{
    srand( time( 0 ) );   // randomize

    // States of the game system
    const int NEW_GAME = 1;
    const int FIRST_ROLL = 2;
    const int SUBSEQUENT_ROLL = 3;
    const int WIN = 4;
    const int LOSE = 5;
    const int GAME_OVER = 6;

    int game_state = NEW_GAME;
    bool game_over = false;

    int roll, point;

    while ( game_over == false )   // !game_over
    {
        switch ( game_state )
        {
        case NEW_GAME:
            cout << "Welcome to the Casino!\n";
            game_state = FIRST_ROLL;
            break;

        case FIRST_ROLL:
            roll = roll_dice();
            cout << "You rolled: " << roll << endl;
            if ( roll == 7  ||  roll == 11 ) {
                game_state = WIN;
            } else if ( roll == 2  ||  roll == 12 ) {
                game_state = LOSE;
            } else {
                point = roll;
                cout << "(so your point is " << point
                     << ")\n";
                game_state = SUBSEQUENT_ROLL;
            }
            break;

        case SUBSEQUENT_ROLL:
            roll = roll_dice();
            cout << "You rolled: " << roll << endl;
            if ( roll == 7  ||  roll == 11 ) {
                game_state = LOSE;
            } else if ( roll == point ) {
                game_state = WIN;
//          } else {
//              game_state = SUBSEQUENT_ROLL;
            }
            break;

        case WIN:
            cout << "YOU WIN!\n";
            game_state = GAME_OVER;
            break;

        case LOSE:
            cout << "YOU LOSE!\n";
            game_state = GAME_OVER;
            break;

        case GAME_OVER:
            cout << "Game over....\n";
            game_over = true;
            break;

        default:
            cerr << "Something's wrong!\n";
            game_over = true;
            break;
        }
    }

    return 0;
}