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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 "char_queue.h" #include <cstring> using std::strncpy; #include <string> using std::string; #include <iostream> using std::cout; using std::endl; int main() { Queue<const char*> q1; // dynamically allocate and initialize a char array char *cp = "hello"; const size_t len = strlen("hello"); char* hi = new char[len + 1]; strncpy(hi, cp, len + 1); q1.push(hi); // put pointer to dynamically allocated array in q1 // delete the dynamically allocated array -- // disaster if Queue holds original pointer and not a copy of the array! delete[] hi; q1.push("world"); q1.push("bye"); cout << q1 << endl; for (int i = 0; i != 3; ++i) { cout << q1.front() << endl; q1.pop(); } cout << "q1 is empty? " << ((q1.empty()) ? "yes" : "no") << endl; string hi2 = "hello"; Queue<string> q2; q2.push(hi2); q2.push("world"); q2.push("bye"); cout << q2 << endl; for (int i = 0; i != 3; ++i) { cout << q2.front() << endl; q2.pop(); } cout << "q2 is empty? " << ((q2.empty()) ? "yes" : "no") << endl; return 0; }