Briefly discuss the software evolution during the period from 1950 to 1990
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From the starting of computer invention, many programming approaches have been used by the programmers to write the solution code. These are as following:-
Modular Programming
Top-Down Programming
Bottom-Up Programming
Structure Programming
Modular Programming:-In this programming approach the complete code is written in small individual parts or say in this programming approach the complete program is divided in small parts(modules) according to there functionality.This approach helps in maintainability by enforcing the boundaries between the modules.Languages supporting modular Programming are:-Ada, Algol, BlitzMax, COBOL, Component Pascal, D, Erlang, F, Fortran, Haskell,IBM/360 Assembler etc.You can read about these on Wikipedia links provided on the keywords.
Top-Down Programming:-It is also called step wise design or deductive reasoning.In this approach program development starts by defining the complex pieces and then these pieces are rewritten to generalize the complex code.So we can say in other word that in top-down programming approach high level of work is defined first and then the low-level inner work)is defined after that.
Bottom-Up Programming:-It is reverse of top-down approach.In this first of all the lowlevel parts of the program are developed and then the complex part are developed from these simple parts.
Modular Programming
Top-Down Programming
Bottom-Up Programming
Structure Programming
Modular Programming:-In this programming approach the complete code is written in small individual parts or say in this programming approach the complete program is divided in small parts(modules) according to there functionality.This approach helps in maintainability by enforcing the boundaries between the modules.Languages supporting modular Programming are:-Ada, Algol, BlitzMax, COBOL, Component Pascal, D, Erlang, F, Fortran, Haskell,IBM/360 Assembler etc.You can read about these on Wikipedia links provided on the keywords.
Top-Down Programming:-It is also called step wise design or deductive reasoning.In this approach program development starts by defining the complex pieces and then these pieces are rewritten to generalize the complex code.So we can say in other word that in top-down programming approach high level of work is defined first and then the low-level inner work)is defined after that.
Bottom-Up Programming:-It is reverse of top-down approach.In this first of all the lowlevel parts of the program are developed and then the complex part are developed from these simple parts.
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