Classes in C++

 

A class is a user defined data type that contains data members and member function.

Definition and declaration of class:

A class definition is a process of naming a class and data variable and operations of class.

A class declaration is representation of objects of the class and set of operations that can apply to objects.

The members of class are data members and member functions.

The data variables of class are known as data members.

The set of operations that are performed on the objects of the class are known as member function.

Syntax:

class user_defined_nae

{

            private:

                        data member

                        member function

            public:

                        data member

                        member function

            protected:

                        data member

                        member function

};

Ex:

class time

{

            private:

                        int hh,mm,ss;

            public:

                        void getdata();

                        void putdata();

};

Here name of the class is time

Data members are hh,mm,ss

Member functions are getdata(), putdata()