How to implement namespace in C++

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In this tutorial we will show you how to implement namespace in C++. After viewing the video tutorial, download the source code and try to modify the code so as to get a feel of what is learned in this video tutorial.

Program

#include<iostream.h>
#include<stdlib.h>
#include<conio.h>

namespace Classes
{
   class Sample
   {
   private:
       int I_length,I_breadth;
   public:
       Sample(int I_dummy1,int I_dummy2)
       {
       I_length=I_dummy1;
        I_breadth=I_dummy2;
       }
       void Display()
       {
           int I_area;
           I_area=I_length*I_breadth;
           cout<<" Area of Rectangle="<<I_area<<" cmsq. ";
       }
   };
};
int main()
{
   cout<<" Calling using scope resolution operator...";
   Classes::Sample obj1(8,3);
   obj1.Display();
   cout<<" Calling using 'using' directive...";
   using namespace Classes;
   Sample obj2(5,9);
   obj2.Display();
   getch();
    return 0;
}

Source Code