oops with c++

Oops is an acronym of Object Oriented Programmings.To understand oops,you must know about objects and all other concepts of oops, which is described below.

The major concepts of oops are:

• Objects and classes
• Data abstraction
• Data encapsulation
• Inheritance
• Polymorphism
• Methods and message passing
• Overloading
• Reusability

Objects:

• Object is generally defined as real time entity or run time entity.
• An object may be a name of a person,or a place,or any other things.
• Eg: Arthi, India, 2245601, etc..,

• Syntax:  class_name object name;
• Eg: sample s; where "sample" is the name of the class and s is our object.

Classes:

• Class is defined as an entity which data and functions together.
• It is similar to the concept of STRUCTURE in c language.
• Syntax:

            class  name_of_class

            {

                    private:

                                   variable decln;

                                   function decln;

                    protected:

                                    variable decln;

                                    function decln;

                    public:

                                   variable decln;

                                   function decln;

             };

• Example:

              class sample

              {

                    private:

                                  int a;

                    public:

                                 void welcome()

                                 {

                                      cout<<"welcome";

                                  }

               };

 The variables inside the class are called as data members whereas the functions inside the class is called as member functions