Loop through map and print all the key/value pair : map iterator « map multimap

Loop through map and print all the key/value pair : map iterator « map multimap « C++ Tutorial

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C++ Tutorial » map multimap » map iterator

23.7.2.Loop through map and print all the key/value pair

#include <iostream>

using std::cout;

using std::endl;



#include <map> // map class-template definition



int main()

{

   std::map< int, double, std::less< int > > pairs;



   pairs.insert( std::map< int, double, std::less< int > >::value_type( 15, 2.7 ) );

   pairs.insert( std::map< int, double, std::less< int > >::value_type( 30, 111.11 ) );

   pairs.insert( std::map< int, double, std::less< int > >::value_type( 0, 1010.1 ) );

   pairs.insert( std::map< int, double, std::less< int > >::value_type( 10, 22.22 ) );

   pairs.insert( std::map< int, double, std::less< int > >::value_type( 25, 33.333 ) );

   pairs.insert( std::map< int, double, std::less< int > >::value_type( 0, 77.54 ) ); // dup ignored

   pairs.insert( std::map< int, double, std::less< int > >::value_type( 20, 9.345 ) );

   pairs.insert( std::map< int, double, std::less< int > >::value_type( 15, 99.3 ) ); // dup ignored



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



   // use const_iterator to walk through elements of pairs

   for ( std::map< int, double, std::less< int > >::const_iterator iter = pairs.begin();

      iter != pairs.end(); ++iter )

      cout << iter->first << '\t' << iter->second << '\n';



   cout << endl;

   return 0;

}

pairs contains:
Key     Value
0       1010.1
10      22.22
15      2.7
20      9.345
25      33.333
30      111.11

23.7.map iterator
	23.7.1.	Use iterator to loop through map and print all elements
	23.7.2.	Loop through map and print all the key/value pair
	23.7.3.	Display the first element in map
	23.7.4.	Display the last element in map
	23.7.5.	reverse_iterator from map
	23.7.6.	Cycle through the map in the reverse direction
	23.7.7.	Declare a reverse iterator to a map
	23.7.8.	Declare an iterator to a map
	23.7.9.	const_iterator for map
	23.7.10.	Create int string map and print all element pair

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