#include "library.h"

void print_digit(int digit)
{ if (digit == 0) print("zero");
  else if (digit == 1) print("one");
  else if (digit == 2) print("two");
  else if (digit == 3) print("three");
  else if (digit == 4) print("four");
  else if (digit == 5) print("five");
  else if (digit == 6) print("six");
  else if (digit == 7) print("seven");
  else if (digit == 8) print("eight");
  else if (digit == 9) print("nine");
  else print("!!! out of range!!!"); }

void print_all_digits_of(int n)
{ const int last_digit = n % 2;
  const int rest_of_n = n / 2;
  if (rest_of_n != 0)
  { print_all_digits_of(rest_of_n);
    print(" "); }
  print_digit(last_digit); }

bool user_wants_to_continue()
{ print("more ?");
  const string reply = read_string();
  if (reply == "yes")
    return true;
  else
    return false; }

void test_nums()
{ print("enter number: ");
  const int num = read_int();
  print(num);
  print(": ");
  print_all_digits_of(num);
  new_line();
  if (user_wants_to_continue())  
    test_nums(); }

void main()
{ test_nums();
  print("\ntest complete\n"); }