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Evolution ofProgramming

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OOP

Why we need OOP ?

What lead to OOP ?

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Evolution of Programming (EP)

Your thoughts?

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EP: Unstructured Programming

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• Whole rogram in one file as ase!uence of commands

• "aster E#ecution

• $ifficulty to maintain as Program

grows larger • %ll data is glo&al• 'eeating e!uence needs to &e

coied at re!uired locations

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EP: odular Programming

• Procedures of common functionality aregroued together+

• odules can &e searate and outside the

main rogram+• Each module have its own data and manages

its state+• *hey can &e rogrammed and tested

indeendently

MainProgram----------

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----------------odule,-

odule,.

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EP: odular Programming

• E#licit creation and destruction+• Oerations and $ata decouled/ so need to

&e well orchestrated during invo0ing+

• Oeration centric +• issing *ye afety 1What data can &e

assed2

• Each module can have only one state at atime (E+g+: % module to handle date oeration

can deal with one date at any time)

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EP

 %ny olution ?

3ow we solve our

day,.,day ro&lems

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EP

OOP

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EP

Why these ro&lems

are addressedinitially?

Why we need to

Evolve?

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EP

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