You're mixing a little bit C and C++.
You're including stdio.h which is the "standard"-C header, but your using cin and cout, which are C++-commands.
I've hopefully two solutions.
1) Try to include only iostream (take the .h away).
2) use printf and scanf (C-commands).
I don't think that she did this. A journalist just didn't quote her right.
And although I'm not a German I'm really pleased with the outcome of the elections. Schröder/Fischer will do more for peace than Stoiber could do.
There could also be a problem with the compatibility, because iostream is a C++-headerfile and stdio.h is a C-headerfile. I remeber having such problems with VisualC++, don't know how it is with ProjectBuilder.
If you're really new I'd suggest to start with RealBasic. (http://www.realbasic.com).
There is also a book around (Don't know the name), and the web is plenty of resources for this Programming-language.
It's probably easier to create apps with RealBasic than with Cocoa, but if you really want...