STL vector 删除元素

两种方法：
1、调用vector自身的erase
2、调用erase和remove

void remove_vector(vector<int>& v, int val){    vector<int>::iterator it = v.begin();    while (it != v.end())    {        if (*it == val)        {            it = v.erase(it);        }        else        {            ++it;        }    }}int a[] = {1,2,3,4,5};vector<int> v(a, a+5);remove_vector(v,2);v.erase(remove(v.begin(), v.end(), 3), v.end());vector<int>::iterator it;for (it = v.begin(); it != v.end(); ++it){    cout << *it << " ";}cout << endl;