# A simple example using hash_map in C++

From:http://stackoverflow.com/questions/2179946/can-anybody-offer-a-simple-hash-map-example-in-c

The current C++ standard does not have hash maps, but the coming C++0x standard does, and these are already supported by g++ in the shape of "unordered maps":

#include <unordered_map>
#include <iostream>
#include <string>
using namespace std;

int main() {
    unordered_map <string, int> m;
    m["foo"] = 42;
    cout << m["foo"] << endl;
}

In order to get this compile, you need to tell g++ that you are using C++0x:

g++ -std=c++0x main.cpp

These maps work pretty much as std::map does, except that instead of providing a custom operator<() for your own types, you need to provide a custom hash function - suitable functions are provided for types like integers and strings.

Another one using Visual Studio. net:
http://www.codeguru.com/forum/showthread.php?t=315286