OOPS - [Fundamentals: POP]

♠ Posted by Unknown in Fundamentals,OOPS at 03:20

IntroductionProcedure Oriented Programming (POP) LanguageAdvantages & Disadvantages

Conventional programming using high level language such as COBOL, FORTRAN, and C is commonly known as Procedure Oriented Programming (POP). In Procedure Oriented approach the problem is viewed as a sequence of things to be done such as radiant calculating and printing a number of function are written to accomplish these tasks. The primary focus is on functions.

A typical program structure for procedural programming is shown below. The technique of hierarchical decomposition has been used to specify the tasks to be completed for solving a problem.

Advantages :

1. Emphasis is on doing things

1. Large program are divided into smaller programs known as functions.

1. Most of the functions share global data.

1. Data move the openly around the system from function to function.

1. Functions transform data one from to another.

1. Employs top-down approach in program design.

Disadvantages :

Procedure Oriented Programming basically consists of writing a list to follow and organizing these instructions into groups known as functions. We normally use flowchart to organize these action and represent the flow of control from one action to another. While we concentrate on the development of functions. Very little attention is given to the data that are being used by various functions what happens to the data? how are they affected by the function that work of them?

In multi-function program many important data item are placed as global so that they may be accessed by all the functions each function may have its own local data.

Global data are more well honorable to an inadvertent change by a function. In a large program it is very difficult to identify what data is used by which function. In case we need to revise an external data structure we also need to revise all functions that access the data. This provides an opportunities bugs to creep in.

Another serious drawback with the procedural approach us that is does not model real world problems very well. This is because functions are action oriented and do not really correspond to the element of the problem.