class library in c++

[pooja]

what is a class library and how does it different from c++ header file?

[EventHelix.com]

In general, a class library would consist of several header files and
the associated source files.

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EventStudio System Designer 2.5 - http://www.EventHelix.com/EventStudio
Sequence Diagram Based System Design and Modeling Tool

[pooja]

thanks.
Tell me one more thing , that how can I hide my header files and other
source file in a class library, so that my client would not be able to
open it and can not tamper the classes with in it.

[EventHelix.com]

Search Google for "c++ code obfuscator".

For source files, you could just ship the object files.

--
EventStudio System Designer 2.5 - http://www.EventHelix.com/EventStudio

Sequence Diagram Based System Design and Modeling Tool

[E. Robert Tisdale]

pooja wrote:

Tell me one more thing,
"How can I hide my header files and other source file in a class library
so that my client would not be able to open it
and can not tamper the classes with in it?"

You can't.
You *must* distribute the header files
which define the public interface for the library.
Developers who distribute proprietary libraries
distribute object files in library archives
and *not* the source files which define the implementation.
You can do this too if you can compile your library
for every target platform.

[pooja]

how can I distribute the header files
which define the public interface for the library.?
how does Developers distribute proprietary libraries
distribute object files in library archives
and *not* the source files which define the implementation.
Tell me the code snippet for it.
also teel me the site from where i can get the information

[John Harrison]

pooja wrote:

how can I distribute the header files
which define the public interface for the library.?
how does Developers distribute proprietary libraries
distribute object files in library archives
and *not* the source files which define the implementation.
That depends on your toolset. For instance on Unix you might use the
'ar' command. With Microsoft VC++ you might use the 'lib' command.

Tell me the code snippet for it.
also teel me the site from where i can get the information

There is no code snippet. You just write the code as normal, make a
library from it. Then send the library and the header files to whoever
wants to use the library.

You get the information by reading the documentation that comes with
your compiler and other tools.

john

[pooja]

Can we develop library files and header files in a way so that it can
not be tampered by the programmers by using Turbo C and Borland C
compiler?

[Kai-Uwe Bux]

pooja wrote:

Can we develop library files and header files in a way so that it can
not be tampered by the programmers by using Turbo C and Borland C
compiler?

The library file is compiled already. Without access to the sources, your
customers will not be inclined to change. (The obvious path of changing a
library file is to recompile the source. This path is blocked if your keep
the source. Non-obvious paths of changing the binary exist, but the few who
can do that, you cannot stop.)

As for the headers, your customers would not use the compiler to "tamper"
with the header. They would just use their favorite text editor and change
it. More likely, however, they would create a different version and then
include their file rather than yours. Nothing forces a user to tell the
compiler about your header just because he intends to tell the linker about
your library. The compiler has no premonitions, it simply does not know
about the linker.

Also, why would that be of your concern? Keep in mind that, since their
version still would have to match the library file, they cannot really
depart very much. However, they could put certain identifiers into a
different namespace. Actually, your customers might have a very legitimate
reason for doing exactly that: it could be the only way to avoid conflicts
arising from the use of several libraries.
Best

Kai-Uwe Bux

[pooja]

Ok thanks , but still some confussion is there

suppose I have created a file "abcd.h" like this
//abcd.h
#inlcude<iostre am.h>
class c1
{
public:
void sum()
{
cout<<"I am sum function";
}
};

now I created another file "file1.cpp" , in which I included this
"abcd.h" file.
//file1.cpp
#include"abcd.h "
void main()
{
c1 obj;
obj.sum();
}

I want that my customer would also use "abcd.h" header file as I am
using it in the above file1.cpp.
Tell me how should I distribute "abcd.h" to my programmer using TC as a
compiler.
Can I Simply copy it on a CD and hand it to the customer or so some
other steps are there?