注意：如果你按照视频中的代码去pat官网测试的会因为格式不对而一分不得，主要原因是最后输出的时候会有多余的空格所以需要特判一下
原题链接:PAT甲级1005
练练手:PAT乙级1002

#include <iostream>
#include <cstring>
#include <algorithm>

using namespace std;

string n[] = {
    "zero","one","two","three","four","five","six","seven","eight","nine"
};

int main()
{
    string num; cin >> num;
    int sum = 0;
    for (auto c : num) sum += c - '0';

    string res = to_string(sum);

    for (int i = 0; i < res.size(); i ++)
    {
        if (i == 0) cout << n[res[i] - '0'];
        else cout << ' ' << n[res[i] - '0'];
    }
    return 0;
}