Cobol/370 for power programmers /

By:

David shelby kirk

Series: seriesPublication details: John Wiley and sons United Estates 1994Edition: 1era edicionDescription: 384 Ilustraciones, tablas, graficos 25cmISBN:

0-471-62367-9

Subject(s):

Ingeniería en tecnologias de la información y comunicaciones

Contents:

Contents List of Figures Preface Acknowledgments 1 Introduction to COBOL II and COBOL/370 1.1. What are COBOL II and COBOL/370? 1.1.1. Overview of COBOL history 1.1.2. Overview of COBOL II 1.1.3. Overview of COBOL/370 LE/370 and AD/CYCLE products 1.2. Major features of COBOL II and COBOL/370 1.2.1. Newer IBM features supported 31-bit addressability Reentrant code Faster sorting VSAM enhancements Higher compiler limits CALLable services Intrinsic functions 1.2.2. ANSI 85 support 1.2.3. Standards control opportunities 1.2.4. SAA opportunity 1.2.5. Improved tuning and cost control Optimization Batched compiles Environment management 1.3. Benefits to an application 1.4. Benefits to a programmer Structured programming Documentation Debugging CICS enhancements 1.5. Developing an approach to learning COBOL II or COBOL/370 Summary 2 Coding Differences between COBOL II, COBOL/370, and OS/VS COBOL How to read the syntax charts 2.1. OS/VS COBOL features that were dropped 2.1.1. Report Writer 2.1.2. ISAM and BDAM 2.1.3. Communications feature 2.1.4. Segmentation feature 2.1.5. Macro-level CICS 2.1.6. EXAMINE and TRANSFORM 2.1.7. READY/RESET TRACE, EXHIBIT, and USE FOR DEBUGGING CURRENT-DATE and TIME-OF-DAY 2.1.8. 2.1.9. NOTE and REMARKS 2.1.10. ON statement 2.1.11. WRITE AFTER POSITIONING statement 2.1.12. STATE and FLOW compile options 2.1.13. OPEN and CLOSE obsolete options 2.2. Modified COBOL components 2.2.1. IDENTIFICATION DIVISION PROGRAM-ID modifications Recommendation for using IDENTIFICATION DIVISION features 2.2.2. ENVIRONMENT DIVISION Use of expanded FILE STATUS codes for VSAM Recommendation for using ENVIRONMENT DIVISION features 2.2.3. DATA DIVISION The FILLER entry Modifications to the USAGE clause Modifications to the VALUE clause

Summary: So, Why a Second Edition? When I wrote the first edition of this book, little did I know that a superset of COBOL II was in the works at IBM. I should have known better. IBM has been consistent in their efforts to periodically upgrade the programming environ-ment, and a superset of COBOL II should have been predictable. Fortunately for those of us who write the code, IBM's newest version of COBOL, SAA AD/Cycle COBOL/370 (referenced as COBOL/370 in this book), builds on the foundation of COBOL II. While COBOL II is certainly a major enhancement to the COBOL language and changed the perception that COBOL is a dead language, COBOL/370 ties many loose ends together from an environmental perspective. We'll see more on that later. As you read this book, you will find that COBOL/370 is actually several products, not just the compiler. I'll cover that shortly. When I wrote the first edition, I felt strongly that COBOL programmers finally had a compiler worthy of professionals. In the two years since that book, I have had this consistently proved to me. Now, COBOL/370 carries forward what was begun with COBOL II, the flexibility to carry an application beyond the mainframe to other platforms. Programmers developing applications at pro-grammable workstations (PWS) now have a compiler that is accessible either from the mainframe or from the PWS. If you're wondering why I didn't write a separate book for COBOL/370, the answer is that the two languages have more similarities than differences. IBM Announced COBOL/370 as a superset of COBOL II and I can't improve on those worda. In case you read the first edition, you will find that all of the programming features introduced for COBOL II are also in COBOL/370. Additionally, if your

Holdings
Item type	Current library	Call number	Copy number	Status	Date due	Barcode
Libro	CI Gustavo A. Madero 2		1	Available

EDITORIAL
John Wiley and sons
ISBN
0-471-62367-9

Contents

List of Figures

Preface

Acknowledgments

1 Introduction to COBOL II and COBOL/370

1.1. What are COBOL II and COBOL/370?

1.1.1. Overview of COBOL history

1.1.2. Overview of COBOL II

1.1.3. Overview of COBOL/370 LE/370 and AD/CYCLE products

1.2. Major features of COBOL II and COBOL/370

1.2.1.

Newer IBM features supported

31-bit addressability

Reentrant code

Faster sorting

VSAM enhancements

Higher compiler limits

CALLable services

Intrinsic functions

1.2.2. ANSI 85 support

1.2.3. Standards control opportunities

1.2.4. SAA opportunity

1.2.5. Improved tuning and cost control Optimization
Batched compiles

Environment management

1.3. Benefits to an application

1.4. Benefits to a programmer

Structured programming

Documentation

Debugging

CICS enhancements

1.5. Developing an approach to learning COBOL II or COBOL/370

Summary

2 Coding Differences between COBOL II, COBOL/370, and OS/VS COBOL

How to read the syntax charts

2.1. OS/VS COBOL features that were dropped

2.1.1. Report Writer

2.1.2. ISAM and BDAM

2.1.3. Communications feature

2.1.4. Segmentation feature

2.1.5. Macro-level CICS

2.1.6. EXAMINE and TRANSFORM

2.1.7. READY/RESET TRACE, EXHIBIT, and USE FOR DEBUGGING

CURRENT-DATE and TIME-OF-DAY 2.1.8.

2.1.9. NOTE and REMARKS

2.1.10. ON statement

2.1.11. WRITE AFTER POSITIONING statement

2.1.12. STATE and FLOW compile options

2.1.13. OPEN and CLOSE obsolete options

2.2. Modified COBOL components

2.2.1. IDENTIFICATION DIVISION PROGRAM-ID modifications

Recommendation for using IDENTIFICATION DIVISION

features

2.2.2. ENVIRONMENT DIVISION

Use of expanded FILE STATUS codes for VSAM Recommendation for using ENVIRONMENT DIVISION

features

2.2.3. DATA DIVISION

The FILLER entry

Modifications to the USAGE clause

Modifications to the VALUE clause

So, Why a Second Edition?

When I wrote the first edition of this book, little did I know that a superset of COBOL II was in the works at IBM. I should have known better. IBM has been consistent in their efforts to periodically upgrade the programming environ-ment, and a superset of COBOL II should have been predictable. Fortunately for those of us who write the code, IBM's newest version of COBOL, SAA AD/Cycle COBOL/370 (referenced as COBOL/370 in this book), builds on the foundation of COBOL II. While COBOL II is certainly a major enhancement to the COBOL language and changed the perception that COBOL is a dead language, COBOL/370 ties many loose ends together from an environmental perspective. We'll see more on that later. As you read this book, you will find that COBOL/370 is actually several products, not just the compiler. I'll cover that shortly.

When I wrote the first edition, I felt strongly that COBOL programmers finally had a compiler worthy of professionals. In the two years since that book, I have had this consistently proved to me. Now, COBOL/370 carries forward what was begun with COBOL II, the flexibility to carry an application beyond the mainframe to other platforms. Programmers developing applications at pro-grammable workstations (PWS) now have a compiler that is accessible either from the mainframe or from the PWS.

If you're wondering why I didn't write a separate book for COBOL/370, the answer is that the two languages have more similarities than differences. IBM Announced COBOL/370 as a superset of COBOL II and I can't improve on those worda. In case you read the first edition, you will find that all of the programming features introduced for COBOL II are also in COBOL/370. Additionally, if your

Ingeniería en Tecnologías de la Información y Comunicación

There are no comments on this title.

to post a comment.

Click on an image to view it in the image viewer