Why does this code work?

So i'm learning c++ by reading a book, and i started messing around with the code. This is how it usually looks like:
{
using namespace std; //for cout
std::cout << "How are you?"; //writes to display
std::cout << std::endl; //goes to next line
std::cout << "I'm fine atleast"; //writes to display
cin.get(); //makes the program stay on the screen until enter is pressed
return 0; //terminate main
}

Now that seems perfectly fine which it is, now why does this work?
{
using namespace std; //for cout
std::cout << "How are you?"; //writes to display
std::cout << std::endl; //goes to next line
std:cout << "I'm fine atleast"; //writes to display
cin.get(); //makes the program stay on the screen until enter is pressed
return 0; //terminate main
}
I removed one of the : from the std:cout << "I'm fine atleast";
I tried to remove it from any of the other std::cout but then the build got errors, someone please explain

I'd really appreciate if you put the code in [CODE] so it's more easy to read it.

Anyway, to the code...

First of all, if you have typed There's no need for you to type: This is enough:
I wrote a much more cleaner version of the code here:

Just a bit curious, What book are you reading?

Oops, Almost forgot to ask.. What kind of compiler are you using?

I actually know that i dont have to write it like that i just tested it for the case of testing, you know, exploring makes you better at stuff.
I'm reading C++ Primal Plus 6th edition.
I'm using Microsoft Visual C++ 2010 Express

Also, if interested, here's the actual code i wrote:

The "why doesn't this work" is because of this line:
std:cout << "I'm fine atleast"; //writes to display

You are missing a : in the std:: namespace prefix.

it works, thats why im wondering lol

edit: Nvm, found out why. /thread