map和vector的erase操作

//清除[first, last)中的所有元素
iterator erase(iterator first, iterator last)
{
    iterator i = copy(last, finish, first);
    destroy(i, finish);
    finish = finish - (last - first);
    return first;
}
//清除某个位置上的元素
iterator erase(iterator position)
{
    if(position + 1 != end())    
        copy(position + 1, finish, position);
    --finish;
    destroy(finish);
    return position;
}

for(vector<int>::iterator it = vecInt.begin(); it != vecInt.end();)
{
    if(*it == 0)
    {
        it = vecInt.erase(it);
    }
    else
    {
        it++;
    }
}

(1) void erase (iterator position) { t.erase(position); }
(2) size_type erase (const key_type& x) { return t.erase(x); }
(3) void erase (iterator first, iterator last) { t.erase(first, last); }

for(map<int,int>::iterator it = mapInt.begin(); it != mapInt.end();)
{
    if(it->second == 0)
    {
        mapInt.erase(it++);
    }
    else
    {
        it++;
    }
}