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Programmable Logic Controller (PLC)
Published in Chanchal Dey, Sunit Kumar Sen, Industrial Automation Technologies, 2020
In general, the major part of the program is contained in blocks that contain the program logic in graphical format. For improved modularity, these blocks can be called in a sequence or in nested configurations. Special function blocks are used to realize both frequently used or complex functions, and these blocks can be ‘parameterized’. Similarly, individual steps of a control sequence can be programmed into such a block and reused at various points in a program. With adequate expertise, the user can produce own function blocks. Users can also define separate data blocks for special purposes, such as monitoring, trending, etc., and perform read/write on such areas. Such facilities of structured programming result in programs which are easier to read, write, debug, and maintain.
A Brief History of Software Testing
Published in William E. Lewis, David Dobbs, Gunasekaran Veerapillai, Software Testing and Continuous Quality Improvement, 2017
William E. Lewis, David Dobbs, Gunasekaran Veerapillai
The first computers were developed in the 1950s, and FORTRAN was the first 1GL programming language. In the late 1960s, the concept of “structured programming” stated that any program can be written using three simple constructs: simple sequence, if-then-else, and do while statements. There were other prerequisites such as the program being a “proper program” whereby there must exist only one entry and one exit point. The focus was on the process of creating programs.
C Programming
Published in Paul W. Ross, The Handbook of Software for Engineers and Scientists, 2018
In summary, structured programming has proven to be an important paradigm for developing software in procedural programming languages that is sufficiently powerful to capture any algorithm, and that can be used to produce understandable, verifiable, and modifiable code for complex algorithms. The C programming language is one of a number of programming languages that directly support structured programming.
Assessing Students’ Object-Oriented Programming Skills with Java: The “Department-Employee” Project
Published in Journal of Computer Information Systems, 2020
Xihui Zhang, John D. Crabtree, Mark G. Terwilliger, Tyler T. Redman
Java is an object-oriented programming (OOP) language. Compared to structured programming techniques, object-oriented design and programming provides a more natural and intuitive way to describe real-world objects by creating classes and their runtime objects (also called instances). People possessing strong OOP skills with Java are in high demand in industry. Nine out of today’s 10 most popular programming languages support OOP.1 Although there are over 100 programming languages in existence today, research has shown that language adoption follows a power law, and the top six languages account for 75% of the software projects at SourceForge.2 As such, it is imperative that institutions of higher learning teach their students OOP skills so that the students are well prepared for their prospective careers in the field of information technology.