Main Menu Inquiry

A*****************************************************************

A*

FILE

NAME:

CUSMST

*

A*

RELATED

PGMS:

CUSMNT, SCHZIP, SCHNAM

*

A* RELATED FILES:

CUSMSTL1, CUSMSTL2, CUSMSTL3 (LOGICAL FILES)

*

A*

DESCRIPTION:

THIS IS THE PHYSICAL FILE CUSMST. IT HAS

*

A*

 

 

ONE RECORD FORMAT CALLED CUSREC.

*

A*****************************************************************

A* CUSTOMER

MASTER

FILE -- CUSMST

 

AR CUSREC

A

CUST

5

0

TEXT('CUSTOMER NUMBER')

A

NAME

20

 

TEXT('CUSTOMER NAME')

A

ADDR1

20

 

TEXT('CUSTOMER ADDRESS')

A

ADDR2

20

 

TEXT('CUSTOMER ADDRESS')

A

CITY

20

 

TEXT('CUSTOMER CITY')

A

STATE

2

 

TEXT('CUSTOMER STATE')

A

ZIP

5

0

TEXT('CUSTOMER ZIP CODE')

A

ARBAL

10

2

TEXT('ACCOUNTS RECEIVABLE BALANCE')

Figure 169. DDS for master database file CUSMST (physical file)

Main Menu

Inquiry

 

 

 

 

 

The

following

illustrates a

simple inquiry program using a WORKSTN file to

 

menu choices

and

accept

input.

MAINMENU:

DDS for a

Display Device

File

 

The DDS for the MAINMENU display device file specifies file level entr describe one record format: HDRSCN. The file level entries define the (DSPSIZ), input defaults (CHGINPDFT), print key (PRINT), and a separate in area (INDARA).

The

HDRSCN

record

format

contains

the

constant 'CUSTOMER

MAIN

INQUIRY',

which

identifies

the display.

It also

contains

the

keywords

TIME

and

will

display the current time and date

on the

screen.

The

CA keywords

function

keys that

can

be used and

associate

the

function

keys

with

the

RPG

program.

 

 

 

 

 

 

 

 

 

 

346 ILE RPG for AS/400 Programmer's Guide

Page 370
Image 370
IBM AS/400 manual DDS for a, Display Device, Main Menu Inquiry

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.