//: C04:WordSet.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
#include "../require.h"
#include <string>
#include <fstream>
#include <iostream>
#include <set>
using namespace std;

int main(int argc, char* argv[]) {
  requireArgs(argc, 1);
  ifstream source(argv[1]);
  assure(source, argv[1]);
  string word;
  set<string> words;
  while(source >> word)
    words.insert(word);
  copy(words.begin(), words.end(),
    ostream_iterator<string>(cout, "\n"));
  cout << "Number of unique words:" 
    << words.size() << endl;
} ///:~