C++ list<list<int> >类型的对象遍历

void listSort(list<list<int> >* initList)

{

    list<list<int> >::iterator itera;

    for(itera = (*initList).begin(); itera!=(*initList).end(); itera ++){

        list<int> ls = *itera;

        for(list<int>::iterator it= ls.begin(); it!=ls.end(); it ++){

            cout << *it << endl;

        }

    }

}

int main()

{

    list<int> ls1;

    ls1.push_front();

    ls1.push_front();

    list<int> ls2;

    ls2.push_front();

    ls2.push_front();

    list<list<int> > lstotal;

    lstotal.push_front(ls1);

    lstotal.push_front(ls2);

    listSort(&lstotal);

    return ;

}