Add value pair to multimap - C++ STL

C++ examples for STL:multimap

  1. HOME
  2. C++
  3. STL
  4. multimap

Description

Add value pair to multimap

Demo Code

#include <iostream> 
#include <map> // multimap class-template definition 
using namespace std; 

// define short name for multimap type used in this program 
typedef multimap< int, double, less< int > > Mmid; 

int main() //from  w w  w  . java 2  s. c om
{ 
   Mmid pairs; // declare the multimap pairs 

   cout << "There are currently " << pairs.count( 15 ) << " pairs with key 15 in the multimap\n"; 

   // insert two value_type objects in pairs 
    pairs.insert( Mmid::value_type( 15, 2.7 ) ); 
    pairs.insert( Mmid::value_type( 15, 99.3 ) ); 

   cout << "After inserts, there are " << pairs.count( 15 ) << " pairs with key 15\n\n" ; 

   // insert five value_type objects in pairs 
    pairs.insert( Mmid::value_type( 30, 111.11 ) ); 
    pairs.insert( Mmid::value_type( 10, 22.22 ) ); 
    pairs.insert( Mmid::value_type( 25, 33.333 ) ); 
    pairs.insert( Mmid::value_type( 20, 9.345 ) ); 
    pairs.insert( Mmid::value_type( 5, 77.54 ) ); 

   cout << "Multimap pairs contains:\nKey\tValue\n" ; 

   // use const_iterator to walk through elements of pairs 
    for ( Mmid::const_iterator iter = pairs.begin(); 
       iter != pairs.end(); ++iter ) 
       cout << iter->first << '\t' << iter->second << '\n'; 

   cout << endl; 
}

Result


Related Tutorials