dbl_ptr.cpp
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上传日期:2022-06-29
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书籍源码
开发平台:
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 <iostream>
- using std::cout;
- using std::endl;
- int main()
- {
- int ival = 1024;
- int *pi = &ival; // pi points to an int
- int **ppi = π // ppi points to a pointer to int
- cout << "The value of ivaln"
- << "direct value: " << ival << "n"
- << "indirect value: " << *pi << "n"
- << "doubly indirect value: " << **ppi
- << endl;
- int i = 42, j = 1024;
- int *p1 = &i, *p2 = &j;
- *p2 = *p1 * *p2;
- *p1 *= *p1;
- cout << "j = " << j << endl;
- cout << "i = " << i << endl;
- return 0;
- }