C++中vector容器的逆序访问

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

int main()
{
    int a = 0, d = 0, answer1 = 0, mod = 0, answer2 = 0;
    vector<int> m;
    cout << "Please input the number :" << endl;
    cin >> a;
    cout << "Please input the scale :" << endl;
    cin >> d;
    while (a)
    {
        mod = a%d;
        a = a / d;
        m.push_back(mod);
    }
    for (vector<int>::reverse_iterator it = m.rbegin(); it != m.rend(); it++)
    {
        answer2 = (*it) + answer2 * 10;
    }

    reverse(m.begin(), m.end());
    for (vector<int>::iterator it = m.begin(); it != m.end(); it++)
    {
        answer1 = (*it)+answer1*10;
    }
    cout << answer1 << endl;
    cout << answer2 << endl;
}