iostream.h help

C++ STL headers do not have the .h extension

your code might look like

#include <iostream>
#include <cstdlib>

using std::cout;
using std::endl;

int main()
{
    cout << "hello cokedude" << endl;

}

That source code is very c-ish, and quite wrong C++. It might compile under visual studio, but any sane compiler would reject that.

1) Dont use /*...*/ for single line comments

2) cout and endl are members of the std:: namespace

Yea your right with your first post. Just needed to remove the .h.

#include <iostream>

As for your second post that is not always correct. I have a centos system and it compiles it. Any idea why my centos system compiles this?

It shouldn't; it means that one of the headers has imported the std namespace incorrectly. The whole point of std:: was to reduce the name-collision problem (oh you want a doitNow() function too? Sorry -- names taken!)

/**/ is not wrong, it just doesn't nest, so is really annoying when you want to /**/ out a larger block.