How to layout codes in namespace and library?

[buddha87]

I have a question about how I should layout the codes for namespace.
Assume in my code I have three class a, b, c and I want to put them in namespace own
Then I plan to create file ownlib.h and ownlib.cpp

in ownlib.h, I put all three class declarations as:

namespace own
{
class a
{
private:
public : func1
}

class b
{
private:
public : func1
}

class c
{
private:
public : func1
}
}

in ownlib.c,I put three class declarations as:

#include "ownlib.h"

namespace own
{
void a::func1();
void b::func1();
void c::func1();

}

Is this the right layout?

Based my understanding, I can compile these two files (.h and .cpp) to static library to be a ownlib.lib file.
But namespace and library should be two different concepts. So I have following questions:
1. Can I add class D, which is in namespace own, but not in library ownlib? If I can, how?
2. Can I add class D, which is in library ownlib, but not in namespace own? If I can, how?


Thanks in advance.

[coder777]

namespace is what it imply: a naming convention. So you can put the class D in any namespace you want no matter whether that namespace already exists or not.

Yes it is irrelevant if and in what context the namespace appears. Just avoid name conflicts.

[skorefish]

What you put in the header file will be visible. The classes,functions,... in the cpp are hidden. So put only in the .Hpp what you want to expose...

[buddha87]

Thanks for reply.

Would you please give an example how to write the code that:

putting the class D in library ownlib, but add it to another namespace (e.g.: other)?

Thanks in advance.

[coder777]

Whether the class D appears in the library ownlib depends on your project setting (which depends on the IDE you're using, basically: tell the IDE that you want the file associated with class D in ownlib)

but add it to another namespace (e.g.: other)?

Um

namespace other
{
  class D
  {
  };
}

?

[buddha87]

Thanks for reply.

Meanwhile, we can also use a same namespace in different cpp files, as :

in file a.cpp:

namespace own
{
class A
{
};
}

in file b.cpp

namespace own
{
class B
{
};
}

Correct?

Thanks.

[coder777]

Correct?

Yes

[buddha87]

Thanks very much.