#include <iostream>
#include <fstream>
#include <string>

using namespace std;

bool is_word_in_array(string word, string array[], int len);

int read_file(ifstream & din, string coll[], int arrsize)
                 //    &   din is not a copy of book, it actually
                 //        is book, the one and only, itself.
{ int count = 0;
    //     while (book.eof() == false)    no no no. test after attempting.
  while (true)
  { string w;
    din >> w;
    if (din.fail())
      break;
    if (count >= arrsize)
    { cerr << "array too small\n";
      return count; }
    if (is_word_in_array(w, coll, count) == false)
    { coll[count] = w;
      count += 1; } }
  return count; }

void print_array(string a[], int len)
{ for (int i = 0; i < len; i += 1)
    cout << i << ": " << a[i] << "\n"; }

bool is_word_in_array(string word, string array[], int len)
{ for (int i = 0; i < len; i += 1)
    if (array[i] == word)
      return true;
  return false; }

int main()
{ const int maxsize = 41000;
  string content[maxsize];     // a bit of a cheat, pre-reading file
  ifstream book("/home/www/text/buchan/thirtyninesteps");
  if (book.fail())
  { cerr << "Can't open file\n";
    exit(1); }

  int count = read_file(book, content, maxsize);
  cout << "there were " << count << " words\n";

  print_array(content, count);

  book.close(); }