C++ LANGUAGE ACCESSING THE DATA MEMBERS

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C++ LANGUAGE ACCESSING THE DATA MEMBERS

 
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 the 
following example to make the things clear: 

#include <iostream> 
 
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 the following result: 
Volume of Box1 : 210 
Volume of Box2 : 1560 
It is important to note that private and protected members cannot be 
accessed directly using direct member access operator (.). We will 
learn how private and protected members can be accessed.