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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;
- }
-