text: /*
   * This file contains code from "C++ Primer, Fifth Edition", by Stanley B.
   * Lippman, Josee Lajoie, and Barbara E. Moo, and is covered under the
   * copyright and warranty notices given in that book:
   * 
   * "Copyright (c) 2013 by Objectwrite, Inc., Josee Lajoie, and Barbara E. Moo."
   * 
   * 
   * "The authors and publisher have taken care in the preparation of this book,
   * but make no expressed or implied warranty of any kind and assume no
   * responsibility for errors or omissions. No liability is assumed for
   * incidental or consequential damages in connection with or arising out of the
   * use of the information or programs contained herein."
   * 
   * Permission is granted for this code to be used for educational purposes in
   * association with the book, given proper citation if and when posted or
   * reproduced. Any commercial use of this code requires the explicit written
   * permission of the publisher, Addison-Wesley Professional, a division of
   * Pearson Education, Inc. Send your request for permission, stating clearly
   * what code you would like to use, and in what specific way, to the following
   * address: 
   * 
   * 	Pearson Education, Inc.
   * 	Rights and Permissions Department
   * 	One Lake Street
   * 	Upper Saddle River, NJ  07458
   * 	Fax: (201) 236-3290
  */
  #ifndef SMALL_SI_H
  #define SMALL_SI_H
  
  // This file isn't used in our code, but illustrates the
  // definitions that are equivalent to Sales_data's 
  // synthesized copy control members 
  
  #include "Version_test.h"
  
  #include <string>
  
  class Sales_data {
  public:
      Sales_data(const std::string & s = ""): bookNo(s),
                                            units_sold(0), revenue(0.0) { }
  
  	Sales_data(const std::string &book, unsigned cnt, double price):
  	        bookNo(book), units_sold(cnt), revenue(cnt * price) { }
  
  	// equivalent to the synthesized copy constructor
  	Sales_data(const Sales_data &rhs): bookNo(rhs.bookNo),
                      units_sold(rhs.units_sold), revenue(rhs.revenue) { }
  
  	// equivalent to the synthesized destructor
  	// no work to do other than destroying the members, 
  	// which happens automatically
      ~Sales_data() { } 
     
      Sales_data& operator=(const Sales_data &); // assignment operator
  private:
      std::string bookNo;
  #ifdef INIT_LIST
      int units_sold;
      double revenue;
  #else
      int units_sold = 0;
      double revenue = 0.0;
  #endif
  };
  
  // equivalent to the synthesized copy-assignment operator
  Sales_data& 
  Sales_data::operator=(const Sales_data &rhs)
  {
  	bookNo = rhs.bookNo;          // calls the string::operator=
  	units_sold = rhs.units_sold;  // uses the built-in int assignment
  	revenue = rhs.revenue;        // uses the built-in double assignment
  	return *this;                 // return a reference to this object
  }
  
  #endif
  