Count element in multiset - C++ STL

C++ examples for STL:multiset

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Description

Count element in multiset

Demo Code

#include <iostream> 
 #include <set> // multiset class-template definition 
 #include <algorithm> // copy algorithm 
 #include <iterator> // ostream_iterator 
using namespace std; 

// define short name for multiset type used in this program 
typedef multiset< int, less< int > > Ims; 

int main() //w w w  .  j  a  v  a 2  s  .co  m
{ 
   const int SIZE = 10; 
   int a[ SIZE ] = { 7, 22, 9, 1, 18, 30, 100, 22, 85, 13 }; 
   Ims intMultiset; // Ims is typedef for "integer multiset" 
   ostream_iterator< int > output( cout, " " ); 

   cout << "There are currently " << intMultiset.count( 15 ) 
       << " values of 15 in the multiset\n" ; 

   intMultiset.insert( 15 ); // insert 15 in intMultiset 
   intMultiset.insert( 15 ); // insert 15 in intMultiset 
   cout << "After inserts, there are " << intMultiset.count( 15 ) 
       << " values of 15 in the multiset\n\n"; 


}

Result


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