CLASS

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Accessing the Data Members:-
The public data members of objects of a class can be accessed using the direct member access operator (.). Let us try following example to make the things clear:

#include <iostream.h > 
using namespace std;
class Box 
{ 
   public: 
      double length;   		  // Length of a box 
      double breadth;  		  // Breadth of a box 
      double height;   		  // Height of a box 
}; 
int main( ) 
{
   Box Box1;         		  // Declare Box1 of type Box 
   Box Box2;        		  // Declare Box2 of type Box 
   double volume = 0.0;   	  // Store the volume of a box here 
    
// box 1 specification 
   Box1.height = 5.0; 
   Box1.length = 6.0;   
   Box1.breadth = 7.0; 
  
 // box 2 specification 
   Box2.height = 10.0; 
   Box2.length = 12.0; 
   Box2.breadth = 13.0; 
  
 // volume of box 1 
   volume = Box1.height * Box1.length * Box1.breadth; 
   cout << "Volume of Box1 : " << volume << endl; 
   
// volume of box 2 
   volume = Box2.height * Box2.length * Box2.breadth; 
   cout << "Volume of Box2 : " << volume << endl;
   return 0;
} 

When the above code is compiled and executed, it produces following result: Volume of Box1 : 210 Volume of Box2 : 1560 It is important to note that private and protected members can not be accessed directly using direct member access operator (.).