Main Menu Inquiry

*****************************************************************

*

PROGRAM NAME:

CUSMAIN

 

 

*

* RELATED FILES:

MAINMENU (DSPF)

*

*

RELATED PGMS:

CUSMNT

(ILE RPG PGM)

*

*

 

 

 

SCHZIP

(ILE RPG PGM)

*

*

 

 

 

SCHNAM

(ILE RPG PGM)

*

*

DESCRIPTION:

THIS IS A CUSTOMER MAIN INQUIRY PROGRAM.

*

*

 

 

 

IT PROMPTS

THE USER TO CHOOSE FROM ONE OF THE *

*

 

 

 

FOLLOWING ACTIONS:

*

*

 

 

 

1.MAINTAINS (ADD, UPDATE, DELETE AND DISPLAY)

*

*

 

 

 

CUSTOMER

RECORD.

*

*

 

 

 

2.SEARCH CUSTOMER RECORD BY ZIP CODE.

*

*

 

 

 

3.SEARCH CUSTOMER RECORD BY NAME.

*

*****************************************************************

FMAINMENU

CF

E

 

 

WORKSTN

 

C

 

 

 

EXFMT

 

HDRSCN

 

C*

 

 

 

 

 

 

 

C

 

 

 

DOW

 

NOT *IN03

 

C

 

 

 

SELECT

 

 

 

C

 

 

 

WHEN

 

*IN05

 

C

 

 

 

CALLB

 

'CUSMNT'

 

C

 

 

 

WHEN

 

*IN06

 

C

 

 

 

CALLB

 

'SCHZIP'

 

C

 

 

 

WHEN

 

*IN07

 

C

 

 

 

CALLB

 

'SCHNAM'

 

C

 

 

 

ENDSL

 

 

 

C

 

 

 

EXFMT

 

HDRSCN

 

C

 

 

 

ENDDO

 

 

 

C*

 

 

 

 

 

 

 

C

 

 

 

SETON

 

 

LR

 

 

 

 

Figure

171.

Source for module CUSMAIN

 

This module illustrates the use of the CALLB opcode. The appropriate R (CUSMNT, SCHZIP, or SCHNAM) is called by CUSMAIN depending on the user's menu item selection.

To create

the

program

object:

 

1. Create

a module for each source

member (CUSMAIN, CUSMNT, SCHZIP, and

SCHNAM)

using CRTRPGMOD.

 

 

2. Create

the

program

by entering:

 

CRTPGM PGM(MYPROG) MODULE(CUSMAIN CUSMNT SCHZIP SCHNAM) EN￿TMOD(*FIRST)

Note:

The

*FIRST option specifies that the first module in the list,

 

is

selected as

the program

entry procedure.

3. Call the program by entering:

CALL MYPROG

The "main menu" will appear as in Figure 172 on page 349.

348 ILE RPG for AS/400 Programmer's Guide

Page 371 Page 373
Page 372
Image 372
IBM AS/400 manual Using Crtrpgmod Create Program By entering, First option specifies that the first module in the list
Page 371 Page 373

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.
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