PATA1005题解

#include<iostream>
#include<cstring>
#include<stdio.h>
#include<vector>
#include<queue>
#include<stack>
using namespace std;
string alpha[10] = {"zero", "one", "two", "three", "four", "five", "six" , "seven", "eight", "nine"};
stack<string>ans;
void add(string num) {
    int res = 0;
    for(int i = 0; i < num.length(); i++) {
        res += (num[i] - '0');
    }
    if(res == 0) {   //一个临界条件，因为数据可能包含0的情况，但是下面的while循环如果是0就直接跳出了
        cout << "zero";
        return;
    }
    while(res) {
        ans.push(alpha[res%10]);
        res /= 10;
    }
    while(!ans.empty()) {
        cout << ans.top();
        ans.pop();
        if(ans.size() != 0) cout << " ";  //要写在pop之后
    }
}
int main () {
    string str;
    cin >> str;
    add(str);
}