separating interface and implementation in c++

how is the separation of interface and implementation of objects achieved in c++...can you give a simple example....................;)

Interface is the declaration of the class in *.hpp file(eg. myclass.hpp) (header files)

Implementation is the code for the class(eg. myclass.cpp)

People usually give out only the *.hpp and the *.obj files if they want to keep the source code to themselves.

You can make it into a library or dll if you like.

Heres a simple example:

PHP Code:

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//myclass.h
#ifndef __MYCLASS_H__
#define __MYCLASS_H__
class MyClass
{
   MyClass();
   virtual ~MyClass();
   int function(int a);
};
#endif 


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PHP Code:

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//myclass.cpp
#include "myclass.h"
MyClass::MyClass()
{
}
MyClass::~MyClass()
{
}

int function(int a)
{
return(a);
} 


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