C++. STL. Map.

#include <iostream>
#include <vector>
#include <string>
#include <list>
#include <map>
using namespace std;

main () {
   map<int, string> myMap1;
   myMap1[1] = "leon bob";
   myMap1[2] = "john doe";
   myMap1[3] = "jane doe";
   map<int, string>::iterator i;
   for(i=myMap1.begin(); i!=myMap1.end(); i++) {
     cout << (*i).first << ":" << (*i).second << endl;
   }
   cout << myMap1[1] << endl;
   map<string, string> myMap2;
   myMap2["leonBob"] = "developer";
   cout << myMap2["leonBob"] << endl;
}

leon@leon-desktop:~/cpp$ g++ myapp.cpp
leon@leon-desktop:~/cpp$ ./a.out
1:leon bob
2:john doe
3:jane doe
leon bob
developer