Display the first element in map : map iterator « map multimap « C++ Tutorial






#include <iostream>
#include <string>
#include <map>

using namespace std;

int main() {
  map<string, int> m;

  m.insert(pair<string, int>("A", 100));
  m.insert(pair<string, int>("G", 300));
  m.insert(pair<string, int>("B", 200));

  // Declare an iterator to a map<string, int>.
  map<string, int>::iterator itr;

  // Display the first element in m.
  itr = m.begin();
  cout << "Here is the first key/value pair in m: "
       << itr->first << ", " << itr->second << endl;

  return 0;
}








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