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

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#include "stlexam.h"
#pragma hdrstop
/**************************************************************************
*
* sieve.cpp - sieve program. Section 5.3
*
***************************************************************************
*
* (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 <vector>
#ifdef _RW_STD_IOSTREAM
#include <iostream>
#else
#include <iostream.h>
#endif
int main()
{
#ifndef _RWSTD_NO_NAMESPACE
using namespace std;
#endif
cout << "Prime Sieve program, a test of vectors" << endl;
//
// Create a sieve of bits, initially on.
//
const int sievesize = 100;
vector<int,allocator<int> > sieve(sievesize, 1);
//
// Now search for 1 bt positions.
//
for (int i = 2; i * i < sievesize; i++)
if (sieve[i])
for (int j = i + i; j < sievesize; j += i)
sieve[j] = 0;
//
// Now output all the values that are set.
//
for (int j = 2; j < sievesize; j++)
if (sieve[j])
cout << j << " ";
cout << endl;
cout << "End of Prime Sieve program" << endl;
return 0;
}