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Bryan Meyers and Jim Buck. - Programming in RPG IV

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Bryan Meyers and Jim Buck. Programming in RPG IV

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Recently revised and updated, this informative reference gives students and professionals a strong foundation in the essentials of business programming using RPG IV. Complete with numerous programming examples and support material, this account covers a variety of topics, including program development process, RPG IV specifications and operations, top down structured design, database definition and processing, interactive applications, and modular programming. Comprehensive and compatible with IBM i Release 5.4, 6.1, 7.1 and later releases, this manual will equip academics with the necessary tools to create highly effective and maintainable RPG IV programs using the latest techniques-- Book details screen. Read more... Preface --ch. 1. Introduction to programming and RPG --ch. 2 Getting started --ch. 3. Externally described files --ch. 4 Defining data with definition specifications --ch. 5. Using arithmetic operations and functions --ch. 6. Processing character data --ch. 7. Working with dates --ch. 8. Controlling program workflow --ch. 9. Using arrays and tables --ch. 10. Accessing and updating database files --ch. 11. Writing interactive applications --ch. 12. Calling programs and passing parameters --ch. 13. Building modular programs with procedures --ch. 14. Handling errors --ch. 15. Programming with subfiles --appendix A. RPG IV summary --appendix B. RPG IV style guide --appendix C. Program development tools --appendix D. Program testing and debugging --appendix E. Maintaining the past --appendix F. Data files --Index.

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Table of Contents Acknowledgments More so than most new editions this - photo 1
Table of Contents

Acknowledgments

More so than most new editions, this edition of Programming in RPG IV seemed more like writing an entirely new book than updating an existing one. Without the help of the following individuals, this edition would not have been possible. At MC Press, Merrikay Lee streamlined the transition to our new publisher, assuring the books continuing availability. Katie Tipton provided her signature careful editing of the manuscript; Jan Fonda transformed hundreds of pages of text into a handsome layout; and Nathan Martin designed the new cover art. The following Gateway Technical College graduates provided their programming and editing skills to produce the database, programming examples, and other ancillary materials for instructors: Nick Arndt, Joe Upright, Chris Anderson, and Michele Oksa.

Appendix A
RPG IV Summary

This appendix summarizes RPG IV specifications, keywords, operation codes, functions, and other RPG IV syntax components. The information is current for Version 5 Release 4 (V5R4) of the ILE RPG/400 compilers; earlier releases may not support some of the entries in this appendix.

Usage Conventions

In some syntax illustrations, the following characters have special meaning:

Arguments separated by vertical bars ( | ) indicate that only one of the shown values may be entered for the argument. For example, in the following syntax illustration,

Programming in RPG IV - image 2

either of the following entries would be valid:

Programming in RPG IV - image 3

Arguments enclosed in curly braces ( { } ) are optional arguments. For example, in the following syntax illustration,

Programming in RPG IV - image 4

either of the following entries would be valid:

Programming in RPG IV - image 5
Control (H) Specification
Columns Description 15 Sequence number 6 H 780 Control keywords - photo 6
ColumnsDescription
15Sequence number
6H
780Control keywords
81100Comments
Control Keywords
Programming in RPG IV - image 7Specifies ILE activation group (valid only with the CRTBNDRPG compile command).
Programming in RPG IV - image 8Specifies an alternate collating sequence.
Specifies processing for null-capable fields Specifies authority for - photo 9Specifies processing for null-capable fields.
Programming in RPG IV - image 10Specifies authority for users without specific authority to compiled object.
Programming in RPG IV - image 11Specifies binding directory (or directories) to use when binding object.
Programming in RPG IV - image 12Specifies default graphic character set identifier.
Programming in RPG IV - image 13Specifies maximum nesting level for /COPY members
Programming in RPG IV - image 14Provides copyright information to include in module.
Programming in RPG IV - image 15Specifies character to use as currency symbol, enclosed in apostrophes ().
Programming in RPG IV - image 16Specifies compiler conversion options for date, time, timestamp, and graphic data types, as well as variable- length data.
Programming in RPG IV - image 17Specifies numeric field format for the Y edit code: *MDY, *YMD, or *DM. Optional separator character defaults to a (/); an ampersand (&) indicates a blank separator.
Programming in RPG IV - image 18Specifies format for date literals and default format for date fields. Defaults to *ISO.
Programming in RPG IV - image 19Controls which debug aids are generated into compiled module.
Programming in RPG IV - image 20Specifies character used for decimal point for edited numbers, enclosed in apostrophes (). Also indicates whether to print leading zeros. Valid values are ., ,, 0. and 0,.
Programming in RPG IV - image 21Specifies maximum decimal precision of decimal (packed, zoned, binary) intermediate values in expressions.
Programming in RPG IV - image 22Specifies whether to force a program to run in the default activation group (valid only with the CRTBNDRPG compile command).
Specifies default name for RPG program or module Specifies whether - photo 23Specifies default name for RPG program or module.
Specifies whether performance collection is enabled Specifies precision - photo 24Specifies whether performance collection is enabled.
Programming in RPG IV - image 25Specifies precision rules to be used when evaluating expressions.
Programming in RPG IV - image 26Specifies whether to process externally described files with binary (no decimal place) fields as if the fields were integers.
Programming in RPG IV - image 27Specifies compiler options to fix invalid decimal data.
Programming in RPG IV - image 28Specifies whether to use floating-point representation for division.
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