There is no standard way of producing a C++ with a GUI. However there are some good open source cross platform GUI libraries knocking about on the internet. Have a look at:
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wxWidgets[
^]
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fltk[
^]
fltk is interesting as Bjarne Stroustrup uses it in his book on programing with C++ "Programming -- Principles and Practice Using C++." He's got quite a good description of how to start using it in that book. It's a bit simpler to use than wxWidgets as you're learning C++.
Cheers,
Ash
PS: There are others but I haven't used them in anger so I'm not going to throw a recommendation for their use your way.