в 14:21, 25 мая 2010

2010-05-25T14:21:17Z

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2010-05-25T10:28:52Z

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==A multimap can store duplicates==

<source lang="cpp">#include <map>
#include <iostream>
using namespace std;
typedef map <int, string> MAP_INT_STRING;
typedef multimap <int, string> MMAP_INT_STRING;
int main ()
{
MMAP_INT_STRING mmapIntToString;
mmapIntToString.insert (pair <int, string> (1000, "One Thousand"));
mmapIntToString.insert (MMAP_INT_STRING::value_type (1000, "Thousand"));
cout << endl << "The multimap contains " << mmapIntToString.size ();
cout << " key-value pairs." << endl;
cout << "The elements in the multimap are: " << endl;

return 0;
}</source>

==Instantiating an STL map and multimap (Key Type: integer, Value Type: string)==

<source lang="cpp">#include <map>
#include <string>
int main ()
{
using namespace std;
map <int, string> mapIntegersToString;
multimap <int, string> mmapIntegersToString;
return 0;
}</source>

==make a dictionary out of a multimap==

<source lang="cpp">#include <algorithm>
#include <iostream>
#include <map>
#include <utility>
using namespace std;
int main( )
{
const char* word[] = { "A", "B", "C", "D","E" };
const char* clue[] = { "a", "b","c", "d","e" };
map<string,string> dictionary1;
transform( word, word+sizeof(word)/sizeof(word[0]), clue,inserter( dictionary1, dictionary1.end() ),make_pair<string,string> );
typedef multimap<string,string> Dictionary;
Dictionary dictionary2( dictionary1.begin(),dictionary1.end() );
dictionary2.insert( make_pair( "POPS", "Bursts" ) );
dictionary2.insert( make_pair( "POPS", "Fathers" ) );
dictionary2.insert( make_pair( "ADAM", "Madam" ) );
pair<Dictionary::iterator,Dictionary::iterator> range = dictionary2.equal_range( "POPS" );
for( Dictionary::iterator i = range.first; i != range.second; ++i )
cout << "\nPOPS - " << i->second;
for( Dictionary::iterator i = dictionary2.begin();
i != dictionary2.end(); ++i )
cout << i->first << " - " << i->second << endl;
}</source>

==multimap can return the number of pairs with the same key==

<source lang="cpp">#include <map>
#include <iostream>
using namespace std;
typedef map <int, string> MAP_INT_STRING;
typedef multimap <int, string> MMAP_INT_STRING;
int main ()
{
MMAP_INT_STRING mmapIntToString;
mmapIntToString.insert (MMAP_INT_STRING::value_type (3, "Three"));
mmapIntToString.insert (MMAP_INT_STRING::value_type (45, "Forty Five"));
cout << "The number of pairs in the multimap with 1000 as their key: "
<< mmapIntToString.count (1000) << endl;
return 0;
}</source>

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в 14:21, 25 мая 2010

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