#include "library.h"

const string smalls[] = { "zero", "one", "two", "three", "four", "five", "six", "seven",
                          "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
                          "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };

const string tens[] = { "zero", "ten", "twenty", "thirty", "forty", "fifty", "sixty",
                        "seventy", "eighty", "ninety" };

void say_number(const int N)   // only 0 to 99 so far
{ if (N < 20)
    print(smalls[N]);
  else if (N < 100)
  { print(tens[N / 10]);
    print(" ");
    say_number(N % 10); } }

void test_it()
{ print("Number? ");
  const int num = read_int();
  say_number(num);
  new_line();
  test_it(); }

void main()
{ test_it(); }