Programming in Modula-2

This text is an introduction to programming in general, and a manual for programming with the language Modula-2 in particular. It is oriented primarily towards people who have already acquired some basic knowledge of programming and would like to deepen their understanding in a more structured way. Nevertheless, an introductory chapter is included for the benefit of the beginner, displaying in a concise form some of the fundamental concepts of computers and their programming. The text is therefore also suitable as a self-contained tutorial. The notation used is Modula-2, which lends itself well for a structured approach and leads the student to a working style that has generally become known under the title of structured programming. As a manual for programming in Modula-2, the text covers practically all facilities of that language. Part 1 covers the basic notions of the variable, expression, assignment, conditional and repetitive statement, and array data structure. Together with Part 2 which introduces the important concept of the procedure or subroutine, it contains essentially the material commonly discussed in introductory programming courses. Part 3 concerns data types and structures and constitutes the essence of an advanced course on programming. Part 4 introduces the notion of the module, a concept that is fundamental to the design of larger programmed systems and to programming as team work. The most commonly used utility programs for input and output are presented as examples of modules. And fmally, Part 5 covers facilities for system programming, device handling, and multiprogramming. Front Matter....Pages i-1 Preface....Pages 3-4 Introduction....Pages 5-6 A first example....Pages 7-9 A notation to describe the syntax of Modula....Pages 10-11 Representation of Modula programs....Pages 12-14 Statements and expressions....Pages 15-17 Control Structures....Pages 18-23 Elementary data types....Pages 24-31 Constant and variable declarations....Pages 32-32 The data structure Array....Pages 33-43 Procedures....Pages 44-45 The concept of locality....Pages 46-47 Parameters....Pages 48-50 Function procedures....Pages 51-53 Recursion....Pages 54-60 Type Declarations....Pages 61-62 Enumeration types....Pages 63-63 Subrange types....Pages 64-64 Set types....Pages 65-66 Record Types....Pages 67-69 Records with variant parts....Pages 70-72 Dynamic data structures and pointers....Pages 73-77 Procedure types....Pages 78-79 Modules....Pages 80-81 Definition and implementation parts....Pages 82-85 Program decomposition into modules....Pages 86-92 Local modules....Pages 93-99 Sequential input and output....Pages 100-112 Screen-oriented input and output....Pages 113-124 Low-level facilities....Pages 125-127 Concurrent processes and coroutines....Pages 128-134 Device handling, concurrency, and interrupts....Pages 135-138 Back Matter....Pages 139-178