erasemap.cpp
资源名称:CppPrimer.rar [点击查看]
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上传日期:2022-06-29
资源大小:356k
文件大小:2k
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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 "seq_preamble.h"
- #include <map>
- using std::map;
- int main()
- {
- map<string, int> word_count; // empty map from string to int
- string word;
- while (cin >> word)
- ++word_count[word];
- string removal_word = "the";
- // erase of a key returns number of elements removed
- if (word_count.erase(removal_word))
- cout << "ok: " << removal_word << " removedn";
- else cout << "oops: " << removal_word << " not found!n";
- map<string,int>::iterator where;
- where = word_count.find(removal_word);
- if (where == word_count.end())
- cout << "oops: " << removal_word << " not found!n";
- else {
- word_count.erase(where); // erase iterator returns void
- cout << "ok: " << removal_word << " removed!n";
- }
- return 0;
- }