int tmp1, tmp2, erge;
if (zahl == 0){
    return 0;
} else if (zahl == 1){
    return 1;
} else {
    tmp1 = 0;
    tmp2 = 1;
    erge = 0;
    cout << "0" << endl;
    cout << "1" << endl;
    for (int i = 2; i<= zahl; i++){
        int erge = tmp1 + tmp2;
        tmp1 = tmp2;
        tmp2 = erge;
        cout << erge << endl;
    }
        return erge;
}

}