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  Concept of Abstraction

Introduction to Concept of Abstraction

The object oriented approach invariably uses abstraction which  actually  helps in developing  complex.  Software in a simply  yet efficient way. The OO approach uses two  kinds  of abstraction  procedural  abstraction and data abstraction. They are disused below:

Procedural Abstraction

A we know that program  are built  organized around the  concept of  procedures. The programme is concerned only with  the details of how it is called and what it computes.

In  does not  concern with  the details of how it performs its computation. That is called as the procedural abstraction. So in this approach entire software package  is organized into  a set  of procedure. One procedures. One procedure is the main () procedure which calls other procedures and leads to the procedural abstraction.

Data Abstraction

Data  abstraction refers to abstract the data. The  idea in data abstraction is to  group together the piece o f data  that  describe some entities, so that  programmer  can manipulate the data as  unit. It can be  defined as the process of grouping  together  attributes and actions specifically related to  single entity.  Common  attributes  and specifically responsibilities are grouped together to from  a logical  unit called class.

For  an example a class person has its attributes that  are not  specific to any  given  individual  as shown in fig 7.6. therefore an abstraction of a person  would store those basic attributes along  with  methods to manipulate those attributes. This abstraction is  simple  enough to support all people and can be used to  describe all types of people.

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