C++的程序该怎么编写

Question

Answer 1

利用C++的特性写的：

#include <iostream>
#include <vector>
#include <iterator>
#include <algorithm>

using namespace std;

int main()
{
    int data, length = 0;
    vector<int> v;
    cin >> data;
    while (data > 0)
    {
        v.push_back(data % 10);
        data /= 10;
        length++;
    }
    cout << "它是一个" << length << "位数" << endl;

    cout << "它的每一位为：";
    reverse(v.begin(), v.end());
    for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
    {
        cout << *it << " ";
    }
    cout << endl;

    cout << "逆序输出为：";
    reverse(v.begin(), v.end());
    for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
    {
        cout << *it;
    }

    return 0;
}