ctors.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 <string>
- #include <iostream>
- using std::cout; using std::endl;
- using std::string;
- char *cp = "Hiya"; // null-terminated array
- char c_array[] = "World!!!!"; // null-terminated
- char no_null[] = {'H', 'i'}; // not null-terminated
- string s1(cp); // s1 == "Hiya"
- string s2(c_array, 5); // s2 == "World"
- string s3(c_array + 5, 4); // s3 == "!!!!"
- string s4(no_null); // runtime error: no_null not null-terminated
- string s5(no_null, 2); // ok: s5 == "Hi"
- string s6(s1, 2); // s6 == "ya"
- string s7(s1, 0, 2); // s7 == "Hi"
- string s8(s1, 0, 8); // s8 == "Hiya"
- int main()
- {
- cout << s1 << 'n' << s2 << 'n'
- << s3 << 'n' << s5 << 'n'
- << s6 << 'n' << s7 << endl;
- {
- string s1; // s1 is the empty string
- string s2(5, 'a'); // s2 == "aaaaa"
- string s3(s2); // s3 is a copy of s2
- string s4(s3.begin(),
- s3.begin() + s3.size() / 2); // s4 == "aa"
- cout << s1 << 'n' << s2 << 'n'
- << s3 << 'n' << s4 << endl;
- }
- return 0;
- }