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Software Pioneers - Contributions to Software Engineering (Paperback, Softcover reprint of the original 1st ed. 2002)
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Software Pioneers - Contributions to Software Engineering (Paperback, Softcover reprint of the original 1st ed. 2002)
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A lucid statement of the philosophy of modular programming can be
found in a 1970 textbook on the design of system programs by
Gouthier and Pont [1, l Cfl0. 23], which we quote below: A
well-defined segmentation of the project effort ensures system
modularity. Each task fonos a separate, distinct program module. At
implementation time each module and its inputs and outputs are
well-defined, there is no confusion in the intended interface with
other system modules. At checkout time the in tegrity of the module
is tested independently; there are few sche duling problems in
synchronizing the completion of several tasks before checkout can
begin. Finally, the system is maintained in modular fashion; system
errors and deficiencies can be traced to specific system modules,
thus limiting the scope of detailed error searching. Usually
nothing is said about the criteria to be used in dividing the
system into modules. This paper will discuss that issue and, by
means of examples, suggest some criteria which can be used in
decomposing a system into modules. A Brief Status Report The major
advancement in the area of modular programming has been the
development of coding techniques and assemblers which (1) allow one
modu1e to be written with little knowledge of the code in another
module, and (2) alJow modules to be reas sembled and replaced
without reassembly of the whole system.
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