What I'm I doing wrong?

[Lord Winter]

I've been trying to learn C++ and I've started with the clasic hello world program just as a test. But every time I try to run it the dos type window appears just for a fraction of a second. My code:

// hello world program

#include <iostream>
using namespace std;

int main ()
{
	cout << "Hello World!";
	return 0; }

Does anyone see anything obvious?