setexclusion.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 "assoc_preamble.h"
- #include "seq_preamble.h"
- #include <fstream>
- using std::ifstream;
- void restricted_wc(ifstream &remove_file,
- map<string, int> &word_count)
- {
- set<string> excluded; // set to hold words we'll ignore
- string remove_word;
- while (remove_file >> remove_word)
- excluded.insert(remove_word);
- // print contents of the word exclusion set
- for (set<string>::iterator set_it = excluded.begin();
- set_it != excluded.end();
- ++set_it)
- cout << *set_it << endl;
- // read input and keep a count for words that aren't in the exclusion set
- string word;
- while (cin >> word)
- // increment counter only if the word is not in excluded
- if (!excluded.count(word))
- ++word_count[word];
- }
- // call with the name of the exclusion set file
- int main(int argc, char **argv)
- {
- ifstream remove_file;
- open_file(remove_file, argv[1]); // file of words to ignore
- map<string, int> word_count;
- restricted_wc(remove_file, word_count);
- // get iterator positioned on the first element
- map<string, int>::iterator map_it = word_count.begin();
- // for each element in the map
- while (map_it != word_count.end()) {
- // print the element key, value pairs
- cout << map_it->first << " occurs "
- << map_it->second << " times" << endl;
- ++map_it; // increment iterator to denote the next element
- }
- return 0;
- }