char_main.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 "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;
- }