examples/tutorial/spell.cpp

/**************************************************************************
 *
 * spell.cpp - A spell checking program.
 *
 * $Id: //stdlib/dev/examples/stdlib/tutorial/spell.cpp#13 $
 *
 ***************************************************************************
 *
 * Copyright (c) 1994-2005 Quovadx,  Inc., acting through its  Rogue Wave
 * Software division. Licensed under the Apache License, Version 2.0 (the
 * "License");  you may  not use this file except  in compliance with the
 * License.    You    may   obtain   a   copy   of    the   License    at
 * http://www.apache.org/licenses/LICENSE-2.0.    Unless   required    by
 * applicable law  or agreed to  in writing,  software  distributed under
 * the License is distributed on an "AS IS" BASIS,  WITHOUT WARRANTIES OR
 * CONDITIONS OF  ANY KIND, either  express or implied.  See  the License
 * for the specific language governing permissions  and limitations under
 * the License.
 * 
 **************************************************************************/

#include <fstream>
#include <iostream>
#include <iterator>
#include <set>
#include <string>

#include <examples.h>


typedef
    std::set <std::string,
              std::less<std::string>, std::allocator<std::string> > stringset;
typedef
    std::ostream_iterator<std::string,
                          char, std::char_traits<char> >            ostrm_iter;
typedef
    std::istream_iterator<std::string,
                          char, std::char_traits<char>, 
			  std::ptrdiff_t>  istrm_iter;


void spellCheck (std::istream & dictionary, std::istream & text) {
    
    stringset   words, misspellings;
    std::string word;
    istrm_iter  eof, dstream (dictionary);

    // First read the dictionary.
    std::copy (dstream, eof, std::inserter (words, words.begin ()));

    // Next read the text.
    while (text >> word)
        if (! words.count (word))
            misspellings.insert (word);

    // Finally, output all misspellings.
    std::cout << std::endl << "Misspelled words:" << std::endl;

    std::copy (misspellings.begin (), misspellings.end (),
          ostrm_iter (std::cout, "\n"));
}

int main ()
{
    std::cout << "Enter text:";
    std::ifstream words ("words");
    spellCheck (words, std::cin);
    std::cout << "End of spell check program" << std::endl;
    return 0;
}