#include <bits/stdc++.h>

using namespace std;

template <typename T>
void print(vector<T> &v)
{
    typename vector<T>::iterator it = v.begin();
    while (it != v.end())
    {
        cout << *it << " ";
        it++;
    }
    cout << endl;
}

int main()
{
    int arr1[5] = {1, 2, 3, 4, 5};
    vector<double> v1(arr1, arr1 + 5);

    print(v1);

    cout << "first element is: " << v1.front() << endl;
    cout << "first element addr is: " << &v1.front() << endl; // 与 day9/d7.cpp 中的 first addr 不同
    cout << "last element is: " << v1.back() << endl;
    cout << "last element addr is: " << &v1.back() << endl; // 与 day9/d7.cpp 中的 first addr 不同

    return 0;
}