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for_each.cpp
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C/C++ Source or Header
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1998-02-09
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92 lines
#include "stlexam.h"
#pragma hdrstop
/**************************************************************************
*
* for_each.cpp - Example program for applying a function to each element
* in a range. See Class Reference Section
*
* $Id: for_each.cpp,v 1.12 1996/08/28 01:16:49 smithey Exp $
*
***************************************************************************
*
* (c) Copyright 1994, 1995 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.
*
**************************************************************************/
#ifndef _RWSTD_HEADER_REQUIRES_HPP
#include <vector>
#include <algorithm>
#include <functional>
#else
#include <vector.hpp>
#include <algorithm.hpp>
#include <functional.hpp>
#endif
#ifdef _RW_STD_IOSTREAM
#include <iostream>
#else
#include <iostream.h>
#endif
#ifndef _RWSTD_NO_NAMESPACE
using namespace std;
#endif
//
// Function class that outputs its argument times x.
//
template <class Arg>
class out_times_x : private unary_function<Arg,void>
{
private:
Arg multiplier;
public:
out_times_x(const Arg& x) : multiplier(x) { }
void operator()(const Arg& x) { cout << x * multiplier << " " << endl; }
};
int main ()
{
int sequence[5] = {1,2,3,4,5};
//
// Set up a vector.
//
vector<int,allocator<int> > v(sequence+0, sequence+5);
//
// Setup a function object.
//
out_times_x<int> f2(2);
for_each(v.begin(),v.end(),f2); // Apply function
return 0;
}