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

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#include "stlexam.h"
#pragma hdrstop
/**************************************************************************
*
* widwork.cpp - widget works, from Chapter 6.3
*
***************************************************************************
*
* (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 <list>
# include <algorithm>
# include <functional>
#ifdef _RW_STD_IOSTREAM
#include <iostream>
#else
#include <iostream.h>
#endif
#ifndef _RWSTD_NO_NAMESPACE
using namespace std;
using namespace std::rel_ops;
#endif
class Widget
{
public:
Widget(int a = 0) : id(a) { }
void operator= (const Widget& rhs) { id = rhs.id; }
int id;
friend ostream & operator << (ostream & out, const Widget & w)
{ return out << "Widget " << w.id; }
};
bool operator== (const Widget& lhs, const Widget& rhs)
{ return lhs.id == rhs.id; }
bool operator< (const Widget& lhs, const Widget& rhs)
{ return lhs.id < rhs.id; }
struct WidgetTester : binary_function<Widget, int, bool>
{
public:
bool operator () (const Widget & wid, int testid) const
{ return wid.id == testid; }
};
class inventory
{
public:
void order (int wid); // Process order for widget type wid.
void receive (int wid); // Receive widget of type wid in shipment.
private:
list<Widget,allocator<void> > on_hand;
list<int,allocator<int> > on_order;
};
void inventory::order (int wid)
{
cout << "Received order for widget type " << wid << endl;
list<Widget,allocator<void> >::iterator wehave = find_if(on_hand.begin(), on_hand.end(),
bind2nd(WidgetTester(), wid));
if (wehave != on_hand.end())
{
cout << "Ship " << *wehave << endl;
on_hand.erase(wehave);
}
else
{
cout << "Back order widget of type " << wid << endl;
on_order.push_front(wid);
}
}
void inventory::receive (int wid)
{
cout << "Received shipment of widget type " << wid << endl;
list<int,allocator<int> >::iterator weneed = find(on_order.begin(), on_order.end(), wid);
if (weneed != on_order.end())
{
cout << "Ship " << Widget(wid) << " to fill back order" << endl;
on_order.erase(weneed);
}
else
on_hand.push_front(Widget(wid));
}
int main ()
{
cout << "Widget Works test program" << endl;
inventory stock;
stock.receive(1);
stock.receive(2);
stock.receive(3);
stock.order(2);
stock.order(2);
stock.order(3);
stock.receive(2);
cout << "End of widget words test program" << endl;
return 0;
}