use_equalrange.cpp

C++Primer 经典之作

/*
 * 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: [phone]
*/ 

#include "algs_preamble.h"

int main() 
{
	vector<string> words;
	string tmp;
	while (cin >> tmp)
		words.push_back(tmp);
	sort(words.begin(), words.end());
	typedef vector<string>::iterator veciter;
	veciter iter = words.begin();
	while (iter != words.end()) {
		pair<veciter, veciter> range = 
		    equal_range(words.begin(), words.end(), *iter);
		cout << *iter << " occurs " 
		     << range.second - range.first
		     << " times" << endl;
		iter = range.second;
	}
	return 0;
}