问我不能在删除之前指出的对象iter2之后增加iter2吗？

EN

#include<iostream>
#include<vector>
using namespace std;

int main(void) {

    vector <string> v;

    v.push_back("aaaa");
    v.push_back("bbbb");
    v.push_back("cccc");
    v.push_back("dddd");
    v.push_back("eeee");
    v.push_back("ffff");

    vector<string>::iterator iter2;

    iter2 = v.begin() + 2; 
    v.erase(iter2);
    iter2++;  ////  error happened  

    for (iter2 = v.begin(); iter2 != v.end(); iter2++) {
        cout << *iter2 << " ";
    }

}