Question

Find which of the following uses encapsulation?

(a) void main(){  int a;  void fun( int a=10;  cout<<a); fun(); }

(b) class student{ int a;   public: int b;};

(c) class student{int a; public: void disp(){ cout<<a;} };

(d) struct topper{ char name[10]; public : int marks; }

The question was asked by my college professor while I was bunking the class.

My question comes from Encapsulation in chapter OOPs Concept & Features of Object Oriented Programming

Answer 1

The correct option is (c) class student{int a; public: void disp(){ cout<<a;} };

The explanation is: It is the class which uses both the data members and member functions being declared inside a single unit. Only data members can be there in structures also. And the encapsulation can only be illustrated if some data/operations are associated within class.