widwork.cpp

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#include <algorithm>
#include <examples.h>
#include <widwork.h>
 
std::ostream& operator<< ( std::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;
}
 
 
bool WidgetTester::operator () (const Widget & wid, int testid) const 
{
    return wid.id == testid;
}
 
 
void inventory::order (int wid) {
    
    std::cout << "Received order for widget type " << wid << std::endl;
 
    widgetList::iterator
        wehave = std::find_if (on_hand.begin (), on_hand.end (), 
                               std::bind2nd (WidgetTester (), wid));
    if (wehave != on_hand.end ()) {
        std::cout << "Ship " << *wehave << std::endl;
        on_hand.erase (wehave);
    }
    else {
        std::cout << "Back order widget of type "  << wid  << std::endl;
        on_order.push_front (wid);
    }
}
 
 
void inventory::receive (int wid) {
 
    std::cout << "Received shipment of widget type " << wid << std::endl;
 
    idList::iterator weneed = std::find (on_order.begin (),
                                         on_order.end (), wid);
    if (weneed != on_order.end ()) {
        std::cout << "Ship " << Widget (wid) << " to fill back order"
                  << std::endl;
        on_order.erase (weneed);
    }
    else
        on_hand.push_front (Widget (wid));
}
 
 
int main ()
{
    std::cout << "Widget Works test program" << std::endl;
 
    inventory stock;
    stock.receive (1);
    stock.receive (2);
    stock.receive (3);
    stock.order (2);
    stock.order (2);
    stock.order (3);
    stock.receive (2);
    
    std::cout << "End of widget words test program" << std::endl;
 
    return 0;
}