number to word conversation 1 to 10 digit

nclude <iostream>
#include <string>
using namespace std;

int main() {
  int num;
  string str;
  cin >> num >> str;
  if (num == 0) {
    cout << str << endl;
  } else {
    int len = str.length();
    int i = 0;
    while (i < len) {
      if (str[i] == ' ') {
        str