Programming_Course/Chapter 7/7-3/7-3xref.cpp

#include <map>
#include <iostream>
#include <string>
#include <vector>
#include <set>

#include "split.h"

using std::cin;            using std::cout;
using std::endl;           using std::getline;
using std::istream;        using std::string;
using std::vector;         using std::map;
using std::set;

// find all the lines that refer to each word in the input
map<string, set<int> >
	xref(istream& in,
	     vector<string> find_words(const string&) = split)
{
	string line;
	int line_number = 0;
	map<string, set<int> > ret;

	// read the next line
	while (getline(in, line)) {
		++line_number;

		// break the input line into words
		vector<string> words = find_words(line);

		// remember that each word occurs on the current line
#ifdef _MSC_VER
		for (std::vector<string>::const_iterator it = words.begin();
#else
		for (vector<string>::const_iterator it = words.begin();
#endif
		     it != words.end(); ++it)
			ret[*it].insert(line_number);
	}
	return ret;
}

int main()
{
	// call `xref' using `split' by default
	map<string, set<int> > ret = xref(cin);

	// write the results
#ifdef _MSC_VER
	for (std::map<string, set<int> >::const_iterator it = ret.begin();
#else
	for (map<string, set<int> >::const_iterator it = ret.begin();
#endif
	     it != ret.end(); ++it) {
		// write the word
		cout << it->first << " occurs on line(s): ";

		// followed by one or more line numbers
#ifdef _MSC_VER
		std::set<int>::const_iterator line_it = it->second.begin();
#else
		set<int>::const_iterator line_it = it->second.begin();
#endif
		cout << *line_it;	// write the first line number

		++line_it;
		// write the rest of the line numbers, if any
		while (line_it != it->second.end()) {
			cout << ", " << *line_it;
			++line_it;
		}
		// write a new line to separate each word from the next
		cout << endl;
	}

	return 0;
}



#include <map>           // <20><><EFBFBD><EFBFBD>ӳ<EFBFBD><D3B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣨map<61><70><EFBFBD><EFBFBD><EFBFBD>ڴ洢ÿ<E6B4A2><C3BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD>Ӧ<EFBFBD><D3A6>ϵ
#include <iostream>      // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>׼<EFBFBD><D7BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
#include <string>        // <20><><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD>
#include <vector>        // <20><><EFBFBD>붯̬<EBB6AF><CCAC><EFBFBD>飨vector<6F><72><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
#include <set>           // <20><><EFBFBD>뼯<EFBFBD><EBBCAF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣨set<65><74><EFBFBD><EFBFBD><EFBFBD>ڴ洢<DAB4>к<EFBFBD>

#include "split.h"       // <20><><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><D4B6><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD>split.h<><68><EFBFBD><EFBFBD><EFBFBD><EFBFBD>split<69><74><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

using std::cin;            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>׼<EFBFBD><D7BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
using std::cout;           // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>׼<EFBFBD><D7BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
using std::endl;           // <20><><EFBFBD>뻻<EFBFBD>з<EFBFBD>
using std::getline;        // <20><><EFBFBD><EFBFBD>getline<6E><65><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
using std::istream;        // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
using std::string;         // <20><><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD>
using std::vector;         // <20><><EFBFBD>붯̬<EBB6AF><CCAC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
using std::map;            // <20><><EFBFBD><EFBFBD>ӳ<EFBFBD><D3B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
using std::set;            // <20><><EFBFBD>뼯<EFBFBD><EBBCAF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

// xref <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><C3BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>г<EFBFBD><D0B3>ֵ<EFBFBD><D6B5>к<EFBFBD>
map<string, set<int> >
xref(istream& in,               // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĭ<EFBFBD><C4AC>Ϊcin<69><6E>
	vector<string> find_words(const string&) = split) // ʹ<><CAB9>split<69><74><EFBFBD><EFBFBD><EFBFBD>ָ<D6B8>ʣ<EFBFBD>Ĭ<EFBFBD>ϣ<EFBFBD>
{
	string line;                 // <20><><EFBFBD>ڴ洢ÿ<E6B4A2>е<EFBFBD><D0B5>ı<EFBFBD>
	int line_number = 0;         // <20><>ǰ<EFBFBD>к<EFBFBD>
	map<string, set<int>> ret;   // <20>洢<EFBFBD><E6B4A2><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>кţ<D0BA>ʹ<EFBFBD><CAB9>map<<3C><><EFBFBD><EFBFBD>, set<<3C>к<EFBFBD>>><3E>ṹ

	// <20><><EFBFBD>ж<EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
	while (getline(in, line)) {
		++line_number;  // <20>к<EFBFBD><D0BA><EFBFBD><EFBFBD><EFBFBD>

		// <20><><EFBFBD><EFBFBD>ǰ<EFBFBD>в<EFBFBD><D0B2><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>ʣ<EFBFBD>ʹ<EFBFBD><CAB9>find_words<64><73><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĭ<EFBFBD><C4AC><EFBFBD><EFBFBD>split<69><74>
		vector<string> words = find_words(line);

		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD>е<EFBFBD>ÿ<EFBFBD><C3BF><EFBFBD><EFBFBD><EFBFBD>ʣ<EFBFBD><CAA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD>кŲ<D0BA><C5B2>뵽map<61><70>
		for (vector<string>::const_iterator it = words.begin(); it != words.end(); ++it)
			ret[*it].insert(line_number);  // <20><><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>кŴ<D0BA><C5B4><EFBFBD>map
	}
	return ret;  // <20><><EFBFBD><EFBFBD>map<61><70><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><C3BF><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>к<EFBFBD>
}

int main()
{
	// <20><><EFBFBD><EFBFBD>xref<65><66><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĭ<EFBFBD><C4AC>ʹ<EFBFBD><CAB9>split<69><74><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><D0B5>ʲ<EFBFBD><CAB2>֣<EFBFBD><D6A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>cin
	map<string, set<int>> ret = xref(cin);

	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><C3BF><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>к<EFBFBD>
	for (map<string, set<int>>::const_iterator it = ret.begin(); it != ret.end(); ++it) {
		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		cout << it->first << " occurs on line(s): ";

		// <20><><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><C3B5>ʳ<EFBFBD><CAB3>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>к<EFBFBD>
		set<int>::const_iterator line_it = it->second.begin();
		cout << *line_it;    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>к<EFBFBD>

		++line_it;
		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>к<EFBFBD>
		while (line_it != it->second.end()) {
			cout << ", " << *line_it;
			++line_it;
		}

		// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>з<EFBFBD><D0B7><EFBFBD><EFBFBD>Էָ<D4B7>ÿ<EFBFBD><C3BF><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><CAB5><EFBFBD><EFBFBD><EFBFBD>
		cout << endl;
	}

	return 0;  // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
}