Software Development for Engineers
eBook - ePub

Software Development for Engineers

C/C++, Pascal, Assembly, Visual Basic, HTML, Java Script, Java DOS, Windows NT, UNIX

  1. 674 pages
  2. English
  3. ePUB (mobile friendly)
  4. Available on iOS & Android
eBook - ePub

Software Development for Engineers

C/C++, Pascal, Assembly, Visual Basic, HTML, Java Script, Java DOS, Windows NT, UNIX

About this book

Specialisation in software has become a thing of the past. With the move towards graphical user interface programming, engineers must have a sound knowledge of several programming languages and for the first time most of the main technical languages are introduced in a single volume.All the example programs included relate to real life applications to provide a long needed reference that students will find invaluable throughout their studies, and a definitive guide for professional developers requiring an insight into other languages. Using C++ and Pascal to provide a basic grounding in software development the author then goes on to introduce more advanced concepts such as object-orientated design through the development of C++. Sections on Visual Basic and 80X86 Assembly Language follow before Java, Windows, NT and DOS are introduced, finishing with an overview of the UNIX system.

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PART I
UNIX
35

Introduction to UNIX

35.1 Introduction

UNIX is an extremely popular operating system and dominates in the high-powered, multi-tasking workstation market. It is relatively simple to use and to administer, and also has a high degree of security. UNIX computers use TCP/IP communications to mount disk resources from one machine onto another. Its main characteristics are:
• Multi-user.
• Pre-emptive multitasking.
• Multi-processing.
• Multi-threaded applications.
• Memory management with paging (organizing programs so that the program is loaded into pages of memory) and swapping (which involves swapping the contents of memory to disk storage).
The two main families of UNIX are UNIX System V and BSD (Berkeley Software Distribution) Version 4.4. System V is the operating system most often used and has descended from a system developed by the Bell Laboratories and was recently sold to SCO (Santa Cruz Operation). Popular UNIX systems are:
• AIX (on IBM workstations and mainframes).
• HP-UX (on HP workstations).
• Linux (on PC-based systems).
• OSF/1 (on DEC workstations).
• Solaris (on Sun workstations).
An initiative by several software vendors has resulted in a common standard for the user interface and the operation of UNIX. The user interface standard is defined by the common desktop environment (CDE). This allows software vendors to write calls to a standard CDE API (application specific interface). The common UNIX standard has been defined as Spec 1170 APIs. Compliance with the CDE and Spec 1170 API is certified by X/Open, which is a UNIX standard organization.

35.2 Login into the system

In order to connect to the system a valid user ID and a password are required. These are assigned initially by the system manager. In Sample session 35.1 the user bill_b logs in with the correct password. If the user ID and password a...

Table of contents

  1. Cover image
  2. Title page
  3. Table of Contents
  4. Dedication
  5. Copyright
  6. Preface
  7. PART A: C/PASCAL
  8. PART B: C++
  9. PART C: Assembly Language
  10. PART D: Visual Basic
  11. PART E: HTML/Java
  12. PART F: DOS
  13. PART G: Windows 3.x
  14. PART H: Windows 95/NT
  15. PART I: UNIX
  16. APPENDIX A: Java Classes
  17. APPENDIX B: ANSI-C Functions
  18. APPENDIX C: Turbo Pascal Reference
  19. APPENDIX D: Assembly Language Reference
  20. APPENDIX E: ASCII Character Set
  21. Index