exception_example.cpp
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上传日期:2022-06-29
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书籍源码
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Visual C++
- /*
- * 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
- }