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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