题解 | #迭代器遍历容器#

#include <iostream>
// write your code here......
#include <vector>

using namespace std;

int main() {

    // write your code here......
    int num;
    vector<int> v;

    while (cin >> num) {
        // cin >> num; // 如果把这句放在这里, 而不是 while 后面的括号里, v会多出来一个元素
        v.push_back(num);
    }

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

    for (auto iterator=v.rbegin(); iterator!=v.rend(); iterator++) {
        cout << *iterator << " ";
    }

    cout << endl;

    return 0;
}