multimap.cpp

// multmap.cpp -- use a multimap
#include <iostream>
#include <string>
#include <map>
#include <algorithm>

typedef int KeyType;
typedef std::pair<const KeyType, std::string> Pair;
typedef std::multimap<KeyType, std::string> MapCode;

int main()
{
	using namespace std;
	MapCode codes;

	codes.insert (Pair (415, "San Francisco"));
	codes.insert (Pair (510, "Oakland"));
	codes.insert (Pair (718, "Brooklyn"));
	codes.insert (Pair (718, "Staten Island"));
	codes.insert (Pair (415, "San Rafael"));
	codes.insert (Pair (510, "Berkeley"));

	cout << "Number of cities with area code 415: "
		<< codes.count(415) << endl;
	cout << "Number of cities with area code 718: "
		<< codes.count(718) << endl;
	cout << "Number of cities with area code 510: "
		<< codes.count(510) << endl;
	cout << "Area Code City\n";
	MapCode:: iterator it;
	for (it = codes.begin(); it != codes.end(); ++it) {
		cout << "    " << (*it) .first << "    "
			<< (*it) .second << endl;
	}

	pair<MapCode::iterator, MapCode::iterator> range
		= codes.equal_range(718);
	cout << "Cities with area code 718: \n";
	for (it = range.first; it != range.second; ++it) {
		cout << (*it) .second << endl;
	}

	return 0;
}