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//Download by http://www.NewXing.com /* * This file contains code from "C++ Primer, Fourth Edition", by Stanley B. * Lippman, Jose Lajoie, and Barbara E. Moo, and is covered under the * copyright and warranty notices given in that book: * * "Copyright (c) 2005 by Objectwrite, Inc., Jose 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 Contracts Department * 75 Arlington Street, Suite 300 * Boston, MA 02216 * Fax: (617) 848-7047 */ #include <stdexcept> using std::runtime_error; #include <iostream> #include "Sales_item.h" using std::cin; using std::cout; using std::endl; int main() { Sales_item item1, item2; while (cin >> item1 >> item2) { try { // execute code that will add the two Sales_items // if the addition fails, the code throws a runtime_error exception // first check that data is for the same item if (!item1.same_isbn(item2)) throw runtime_error("Data must refer to same ISBN"); // ok, if we're still here the ISBNs are the same std::cout << item1 + item2 << std::endl; } catch (runtime_error err) { // remind the user that ISBN must match and prompt for another pair cout << err.what() << "\nTry Again? Enter y or n" << endl; char c; cin >> c; if (cin && c == 'n') break; // break out of the while loop } } return 0; // indicate success }