#include <hash_map.h>
#include <iostream.h>
#include <string.h>

int main( )
{
   using namespace std;
   using namespace stdext;
   hash_map <int, string> hm1;

   hash_map <int, string> :: iterator hm1_Iter;
   hash_map <int, string> :: const_iterator hm1_cIter;
   typedef pair <int, string> Int_Pair;

   hm1.insert ( Int_Pair ( 0, "令狐沖" ) );
   hm1.insert ( Int_Pair ( 1, "東方不敗" ) );
   hm1.insert ( Int_Pair ( 2, "任我行" ) );

   hm1_cIter = hm1.begin ( );
   cout << "The first element of hm1 is " 
        << hm1_cIter -> first << "." << endl;
   
   hm1_Iter = hm1.begin ( );
   hm1.erase ( hm1_Iter );

   // The following 2 lines would err because the iterator is const
   // hm1_cIter = hm1.begin ( );
   // hm1.erase ( hm1_cIter );

   hm1_cIter = hm1.begin( );
   cout << "The first element of hm1 is now " 
        << hm1_cIter -> first << "." << endl;
}