problems compiling helloworld.cpp on openbsd3.8

[Jeffrey R. Meyer]

Hello all,

I have a recently built openBSD 3.8 machine and I wanted to be able to 
do some simple c++ programming on it.  I wrote the following helloworld 
program:

#include <iostream>
using namespace std;

int main()
{
    cout << "Hello World!\n";
}

I installed the following packages:
g++-4.0-20050804
gcc-4.0-20050804

The program fails to compile.
Any help would be greatly appreciated.

--Jeff