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I didn't realize there was a default clone.

clone?

>> However, if it were a custom data type, this would not occur because they would always
>> be placed at the same location.

This is (again) missing the point. Any custom type will have a problem...

>> They are more compatible, although may still cause some problems.
I don't understand what you're trying to say. Any library type will cause problems if you link to different implementations of...

>> Use any types except for the standard library types and it works well.

This is wrong. The problem exists for any non-primitive type.

>> So much for the Standard template library.
Why? It's a standard interface, not a standard implementation.

>> Then would you suggest learning Java before C++?
In reference to the original question, yes I would choose Java or C# first because the OP already knows C. In general, it really depends. There's...

>> But since I have learned to program in C I would like first to go to something similar, learn its new features but still programming C-like.

The problem is that to get the most out of C++ you...

I would learn Java or C# rather than C++. It would be too easy to get stuck using C habits if you moved on to C++, and it would be easier to learn C# or Java without that burden.

Once you learn...