C++: A Dialog Programming with the C++ Standard Library

Sharing a Worker Object

Suppose that we have the example program in Figure 10.33 (which is contained in the file refcnt1.cpp if you want to print it out).

Figure 10.33. Safe polymorphism: An example program for reference-counting with StockItems (code\refcnt1.cpp)

#include <iostream> #include <string> #include "itemp.h" using namespace std; int main() { StockItem item1("cups",32,129,10,5,"Bob's Dist.", "2895657951"); // create an undated object StockItem item2("Hot Chicken",48,158,15,12,"Joe's Dist.", "987654321", "19960824"); // create a dated object StockItem item3 = item1; // copy constructor item1 = item2; // assignment operator item1.FormattedDisplay(cout); // display an object with labels return 0; }

This program doesn't do anything ...