#include <iostream>
#include <functional>
 
int main( int argc, char** argv )
{
  //using libstdc++ TR1 implementation (g++43 -std=c++0x)
  std::cout << std::hash<char*>()( argv[0] ) << '\n' ;
 
  //using boost.tr1 library ( #include <boost/tr1/functional.hpp> )
  //std::cout << std::tr1::hash<char*>()( argv[0] ) << '\n' ;
}

#include <string>
#include <iostream>
 
#include <tr1/unordered_map>
 
typedef std::tr1::unordered_map<std::string, int> AgeTable;
 
int main() {
    AgeTable ages;
 
    ages.insert( std::make_pair( "Joe", 25 ) );
    ages.insert( std::make_pair( "Sally", 18 ) );
    ages.insert( std::make_pair( "Billy", 11 ) );
 
    AgeTable::iterator iter;
    for ( iter = ages.begin(); iter != ages.end(); iter++ ) {
        std::cout << iter->first << " is " << iter->second << std::endl;
    }
}