void say(const int n)
/* This function is guaranteed to work every positive int */
{ if (n < 0)
    print("User error: number out of range");
  else if (n < 20)
    print(smalls[n]);
  else if (n < 100)
  { const int digit1 = n / 10;
    const int digit2 = n % 10;
    print(tens[digit1]);
    if (digit2 != 0)
    { print("-");
      say(digit2); } }
  else if (n < 1000)
  { const int digit1 = n / 100;
    const int restdigs = n % 100;
    say(digit1);
    print(" hundred");
    if (restdigs != 0)
    { print(" and ");
      say(restdigs); } }
  else if (n < 1000000)
  { const int firstdig = n / 1000;
    const int restdigs = n % 1000;
    say(firstdig);
    print(" thousand ");
    if (restdigs != 0)
    { if (restdigs < 100)
        print("and ");
      say(restdigs); } }
  else
  { const int firstdig = n / 1000000;
    const int restdigs = n % 1000000;
    say(firstdig);
    print(" million ");
    if (restdigs != 0)
    { if (restdigs < 100)
        print("and ");
      say(restdigs); } } }