Computer Programming Languages in Practice. Made Simple by C. A. Hofeditz

By C. A. Hofeditz

Machine Programming Languages in perform presents an outline of varied laptop programming languages. The booklet starts with the basics: what courses are; how they're deliberate and arranged; what components of the pc the programmer controls; flowcharting; and the way machine facts is equipped. It then discusses fabric universal to all languages, together with the access software, the compiler, the run-time method, syntax diagrams, and coding kinds. the most important part of this publication is dedicated to 2 very hot languages—BASIC and COBOL. It presents a short background of the language's improvement and use; an outline of the way the programming process is prepared; its significant elements, divisions of directions, and an outline of its guideline set (instruction-by-instruction); how a software is written, together with a pattern software; and a self-test, together with workouts during which programming statements has to be written. the ultimate bankruptcy discusses these languages which the reader is much less more likely to use yet may still find out about. incorporated are descriptions of FORTRAN and RPG II.

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If you have a good understanding of what structured programming is, you'll be able to recognize language features that aid in the preparation of structured programs. Let's use an analogy to illustrate the difference between structured and unstructured programs. A pyramid of children's blocks placed alongside a bowl of cooked spaghetti should do. In the spaghetti, it is very difficult to follow an individual strand in the mass, and if the strand is removed, its place with respect to the whole is impossible to determine.

38 Computer Programming Languages in Practice CONSTANTS There are also two types of constants: numeric and string. Logically, a numeric constant is a number written in a statement in its final form, exactly as it will be used in arithmetic. In using the equation to convert from Centrigrade to Fahrenheit temperatures, for example, the constant '32' is written in the statement that does the arithmetic. A string constant is a set of characters in the exact form it will be used. A statement might be written: PRINT "YOUR SCORE IS," X.

What are decision tables, and how are they used? What is pseudocode, and how is it used? 2 Components of a Programming Language When one thinks of a programming language, the first thing that comes to mind are the words that comprise the language. Rightly 4 so, because these are the key elements, but they are only the tip of the iceberg'. A programming language is really a complex system consisting of many components that make it possible for a programmer to use the words. In this chapter, we'll discuss all of those components and show how they work together.

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