/**************************************************************************
 *
 * funct_ob.cpp - Example program for function objects.
 *                See Class Reference Section
 *
 ***************************************************************************
 *
 * Copyright (c) 1994-1999 Rogue Wave Software, Inc.  All Rights Reserved.
 *
 * This computer software is owned by Rogue Wave Software, Inc. and is
 * protected by U.S. copyright laws and other laws and by international
 * treaties.  This computer software is furnished by Rogue Wave Software,
 * Inc. pursuant to a written license agreement and may be used, copied,
 * transmitted, and stored only in accordance with the terms of such
 * license and with the inclusion of the above copyright notice.  This
 * computer software or any other copies thereof may not be provided or
 * otherwise made available to any other person.
 *
 * U.S. Government Restricted Rights.  This computer software is provided
 * with Restricted Rights.  Use, duplication, or disclosure by the
 * Government is subject to restrictions as set forth in subparagraph (c)
 * (1) (ii) of The Rights in Technical Data and Computer Software clause
 * at DFARS 252.227-7013 or subparagraphs (c) (1) and (2) of the
 * Commercial Computer Software – Restricted Rights at 48 CFR 52.227-19,
 * as applicable.  Manufacturer is Rogue Wave Software, Inc., 5500
 * Flatiron Parkway, Boulder, Colorado 80301 USA.
 *
 **************************************************************************/
#include <functional>
#include <deque>
#include <vector>
#include <algorithm>

#ifdef _RW_STD_IOSTREAM
#include <iostream>
#else
#include <iostream.h>
#endif     

#ifndef _RWSTD_NO_NAMESPACE
  using namespace std;
#endif

//
// Create a new function object from unary_function.
//
template<class Arg>
class factorial : public unary_function<Arg, Arg>
{
public:
   Arg operator() (const Arg& arg)
   {
      Arg a = 1;
      for (Arg i = 2; i <= arg; i++)
         a *= i;
      return a;
   }
};

int main ()
{
   //
   // Initialize a deque with an array of integers.
   //
   int init[7] = {1,2,3,4,5,6,7};
   deque<int,allocator<int> > d(init+0, init+7);
   //
   // Create an empty vector to store the factorials.
   //
   vector<int,allocator<int> > v((size_t)7);
   //
   // Transform the numbers in the deque to their factorials and store
   // in the vector.
   //
   transform(d.begin(), d.end(), v.begin(), factorial<int>());
   //
   // Print the results.
   //
   cout << "The following numbers: " << endl << "     ";
   copy(d.begin(), d.end(), 
        ostream_iterator<int,char,char_traits<char> >(cout," "));

   cout << endl << endl;
   cout << "Have the factorials: " << endl << "     ";
   copy(v.begin(), v.end(), 
        ostream_iterator<int,char,char_traits<char> >(cout," "));
   cout << endl;

   return 0;
}