Best C++ program?

Eclipse sucks for C++. Use CLion instead if you don't want to use Visual Studio.

If he's looking to learn C++, why not have java aswell.

When i used it Eclipse worked really good in both, it's his choice though. Everyone will have their own opinions.

Of course it is opinion based, but why would you start with something that limits you in all ways instead of using something that gives you freedom and let's you do everything you want?

I would generally recommend using Visual Studio Community as you have the full package and freedom to do whatever you want. Everything else is limiting you.
Once you know much more, you can go over to CLion if you prefer to use it. Eclipse might be good for Java, but not for C++.
Since OP wants to learn C++, i wouldn't suggest starting with learning Java, as the core of C++ is so much different from Java, it would just confuse him when he wants to learn C++.