By Robert W. Sebesta
Comparing the basics of machine Programming Languages
Concepts of laptop Programming Languages introduces scholars to the elemental innovations of computing device programming languages and gives them with the instruments essential to review modern and destiny languages. An in-depth dialogue of programming language buildings, akin to syntax and lexical and syntactic research, additionally prepares scholars to review compiler design.
The 11th variation keeps an up to date dialogue at the subject with the elimination of outmoded languages corresponding to Ada and Fortran. The addition of proper new subject matters and examples akin to mirrored image and exception dealing with in Python and Ruby upload to the foreign money of the textual content. via a serious research of layout problems with a variety of application languages, options of desktop Programming Languages teaches scholars the fundamental transformations among computing with particular languages.
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Additional info for Concepts of Programming Languages (11th Edition)
Suppose a language has four primitive data types (integer, float, double, and character) and two type operators (array and pointer). If the two type operators can be applied to themselves and the four primitive data types, a large number of data structures can be defined. The meaning of an orthogonal language feature is independent of the context of its appearance in a program. ) Orthogonality follows from a symmetry of relationships among primitives. A lack of orthogonality leads to exceptions to the rules of the language.
It simply is not fair to compare the writability of two languages in the realm of a particular application when one was designed for that application and the other was not. For example, the writabilities of Visual BASIC (VB) (Halvorson, 2013) and C are dramatically different for creating a program that has a graphical user interface (GUI), for which VB is ideal. Their writabilities are also quite different for writing systems programs, such as an operation system, for which C was designed. The following subsections describe the most important characteristics influencing the writability of a language.
If so, the resulting programs can be very confusing. For example, in Fortran 95, special words, such as Do and End, are legal variable names, so the appearance of these words in a program may or may not connote something special. • Form and meaning. Designing statements so that their appearance at least partially indicates their purpose is an obvious aid to readability. Semantics, or meaning, should follow directly from syntax, or form. In some cases, this principle is violated by two language constructs that are identical or similar in appearance but have different meanings, depending perhaps on context.
Concepts of Programming Languages (11th Edition) by Robert W. Sebesta