Ing informatico

IBM 4680-4690 Supermarket Application

Programming Guide

SC30-3634-03

Note: Before using this information and the product it supports, be sure to read the general information under “Notices” on page xix.

Fourth Edition (December 2000) This is the fourth edition of the IBM 4680-4690 Supermarket Application: Programming Guide, SC30-3634. This edition applies to the 4680-4690 IBMSupermarket Application licensed program, program number 5696-536, and to all subsequent releases and modifications until otherwise indicated in new editions. Order publications through your IBM representative or the IBM branch office serving your locality. Publications are not stocked at the address below. A form for readers’ comments appears at the back of this publication. If the form has beenremoved, address your comments to: IBM Corporation, Information Development, Department CJMA PO Box 12195 Research Triangle Park, North Carolina, 27709 USA When you send information to IBM, you grant IBM a nonexclusive right to use or distribute the information in any way it believes appropriate without incurring any obligation to you. © Copyright International Business Machines Corporation 1994, 2000.All rights reserved. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

Contents
Figures Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . xv . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . xix Trademarks . . . . . . . . . . . . . . .. . . . . . . . . . . xix Summary of Amendments . December 2000 . . . . . October 1999 . . . . . . Maintenance Level 9901 . January 1997 . . . . . . Value Pack PRPQ P85536 December 1995 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . xxi . xxi . xxii . xxii . xxiii . xxiii . xxiv

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . xxv Related Publications . . . . . . . . . . . . . . . . . . . . . . xxvi Prerequisite Publications . . . . . . . . . . . . . . . . . . . . . xxix Chapter 1. About This Manual . . . . . . . . . . . . . . . . . . . 1 Chapter Overview . .. . . . . . . . . . . . . . . . . . . . . . 2 Customizing Your Data through User Exits . . . . . . . . . . . . . . 2 Personalizing Your Procedures and Reports through Menu-Selected User Exits 3 Transferring Data to and from a Host . . . . . . . . . . . . . . . . 4 Verifying External Tender. . . . . . . . . . . . . . . . . . . . . 5 Using Delayed Data Maintenance . . . . . . . . . . . . . . . . . 6Programming Reports . . . . . . . . . . . . . . . . . . . . . . . 7 Alternate Supermarket Application Menu Program - Enhancement Feature . . . 7 About the Appendixes . . . . . . . . . . . . . . . . . . . . . . . 8 The Supermarket Database. . . . . . . . . . . . . . . . . . . . 8 The Totals Retentions Area . . . . . . . . . . . . . . . . . . . . 9 Keys on the Terminal Keyboard . . . . . . . . . .. . . . . . . . 10 Print and Display Lines . . . . . . . . . . . . . . . . . . . . . 11 Performance Considerations . . . . . . . . . . . . . . . . . . . 12 Hidden Options . . . . . . . . . . . . . . . . . . . . . . . . 12 PSS and 4680/90 File Translation . . . . . . . . . . . . . . . . . 13 Examples of User Exits . . . . . . . . . . . . . . . . . . . . . 14 Chapter 2. Introduction to User Exits .. . . . . An Overview of User Exits. . . . . . . . . . . Requirements for Implementing User Exits. . . . . Where User Exits Are Located . . . . . . . . . How to Find Data Variables and Include Files . . . Checkout Support Include Files . . . . . . . . Terminal Sales Include Files . . . . . . . . . EFT Processor Include Files . . . . . . . . . Defining Global Variables . . . . . . . . . . . Using...