CodeBlocksPortable/Borland/BCC55/Examples/StdLib/radix.cpp

#include "stlexam.h"
#pragma hdrstop
/**************************************************************************
 *
 * radix.cpp - radix sort program.  Section 7.3
 *
 ***************************************************************************
 *
 * (c) Copyright 1994, 1998 Rogue Wave Software, Inc.
 * ALL RIGHTS RESERVED
 *
 * The software and information contained herein are proprietary to, and
 * comprise valuable trade secrets of, Rogue Wave Software, Inc., which
 * intends to preserve as trade secrets such software and information.
 * This software is furnished 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 software and information or any other copies thereof may
 * not be provided or otherwise made available to any other person.
 *
 * Notwithstanding any other lease or license that may pertain to, or
 * accompany the delivery of, this computer software and information, the
 * rights of the Government regarding its use, reproduction and disclosure
 * are as set forth in Section 52.227-19 of the FARS Computer
 * Software-Restricted Rights clause.
 * 
 * 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.
 * Contractor/Manufacturer is Rogue Wave Software, Inc.,
 * P.O. Box 2328, Corvallis, Oregon 97339.
 *
 * This computer software and information is distributed with "restricted
 * rights."  Use, duplication or disclosure is subject to restrictions as
 * set forth in NASA FAR SUP 18-52.227-79 (April 1985) "Commercial
 * Computer Software-Restricted Rights (April 1985)."  If the Clause at
 * 18-52.227-74 "Rights in Data General" is specified in the contract,
 * then the "Alternate III" clause applies.
 *
 **************************************************************************/

#include <deque>
#include <list>
#include <vector>
#include <algorithm>
#include <numeric>

#ifdef _RW_STD_IOSTREAM
#include <iostream>
#else
#include <iostream.h>
#endif
    
#ifndef _RWSTD_NO_NAMESPACE
using namespace std;
#endif

class copyIntoBuckets
{
  public:
    copyIntoBuckets (int d, vector< deque<unsigned int,
          allocator<int> >, allocator<int>  > & b, bool & f) 
      : divisor(d), buckets(b), flag(f) {}
    int divisor;
    vector< deque<unsigned int,allocator<int> >, allocator<int>  > & buckets;
    bool & flag;
    void operator () (unsigned int v)
    {
        int index = (v / divisor) % 10;
        //
        // Flag is set to true if any bucket other than zeroth is used.
        //
        if (index) flag = true; 
        buckets[index].push_back(v);
    }
};

#ifndef HPPA_WA
list<unsigned int,allocator<int> >::iterator listCopy (list<unsigned int,allocator<int> >::iterator c,
                                       deque<unsigned int,allocator<int> > & lst)
#else
list<unsigned int,allocator<int> >::iterator listCopy (list<unsigned int,allocator<int> >::iterator c,
                                       deque<unsigned int,allocator<int> > lst)
#endif
{
    return copy(lst.begin(), lst.end(), c);
}

void radixSort (list<unsigned int,allocator<int> > & values)
{
    bool flag   = true;
    int divisor = 1;
    
    while (flag)
    {
        vector< deque<unsigned int,allocator<int> >, allocator<int>  > buckets(10);
        flag = false;
        for_each(values.begin(), values.end(), 
            copyIntoBuckets(divisor, buckets, flag));
        accumulate(buckets.begin(), buckets.end(), values.begin(), listCopy);
        divisor *= 10;
        copy(values.begin(), values.end(), ostream_iterator<int,char,char_traits<char> >(cout, " "));
        cout << endl;
    }
}

int main ()
{
    cout << "Radix sort program"  << endl;

    int data[] = { 624, 852, 426, 987, 269, 146, 415, 301, 730, 78, 593 };
    list<unsigned int,allocator<int> > values(11);
    copy(data, data + 11, values.begin());
    radixSort(values);
    copy(values.begin(), values.end(), ostream_iterator<int,char,char_traits<char> >(cout, " "));
    cout << endl;

    cout << "End radix sort program" << endl;

    return 0;   
}