>> I guess this would be helpful
No, not a bit. Your code is wrong.

>> for (n=0;inp[n];n++)
Assuming that n was defined somewhere, the test for imp[n] against 0 is dngerous because imp is...

Koenig Lookup

There are three ways to use a name nested in a namespace. Making the namespace open to the current scope with a using directive:

using namespace std;

cout << "Hello world!" <<...

It depends on the compiler. Generally the files will be compiled in the order that they're listed when the compiler is run.

>>And what's the one declaration rule?
One "definition" rule. It means...

I'm sorry you feel that way. You can go elsewhere and you probably won't be missed. To answer your increasingly rude question, I would probably use a combination of Visual Basic for the user...