演算法學習之路|SpellItRight

Given a non-negative integer N, your task is to compute the sum of all the digits of N, and output every digit of the sum in English.
Input Specification:
Each input file contains one test case. Each case occupies one line which contains an N (<= 10100).
Output Specification:
For each test case, output in one line the digits of the sum in English words. There must be one space between two consecutive words, but no extra space at the end of a line.
Sample Input:
12345
Sample Output:
one five
解題思路：
給出一個非負數N，求出各個位置的數字之和，並用one ,two表示出來，直接模擬即可。

#include<cstdio>
#include<iostream>
#include<vector>
#include<cstring>
using namespace std;
int main(){
  string k;
  string a[15]={"zero","one","two","three","four","five","six","seven","eight","nine"};
  int sum=0;
  cin>>k;
  for(int i=0;i<k.length();i++){
    sum+=k[i]-`0`;
  }
  vector <int>v;
  while(sum){
    v.push_back(sum%10);
    sum/=10;
  }
  if(v.size()==0){
    cout<<"zero";
  }
  else {
    cout<<a[v[v.size()-1]];
  }
  for(int i=v.size()-2;i>=0;i--){
    cout<<" "<<a[v[i]]; 
  }
  return 0;
}