Help with an error

void Personnage::Jouer(Personnage &david, Personnage &goliath)
{
    int i;

    while (i = 1 || i = 2)
    {
        cout << endl << "Que voulez-vous faire?" << endl;
        cout << endl << "1. Donner de la vie a David" << endl;
        cout << endl << "2. Attaquer Goliath" << endl;

        if (i = 1)
        {
            david.boirePotionDeVie(20);

        }
        else if (i = 2)
        {
            david.attaquer(goliath);
        }
        else
        {
            cout << endl << "Mauvaise touche!" << endl;
        }

        cout << endl << "Voici maintenant les nouvelles statistiques..." << endl;

        cout << "David" << endl;
        david.afficherEtat();
        cout << endl << "Goliath" << endl;
        goliath.afficherEtat();

        if (david.m_vie <= 0)
        {
            david.m_vie = 0;
            cout << endl << "David est mort..." << endl;
            i = 5;
        }
        else if (goliath.m_vie <= 0)
        {
            goliath.m_vie = 0;
            cout << endl << "Bravo! David a gagner!" << endl;
            i = 5;
        }
        else
        {
            cout << " " << endl;
        }
    }
}