IBM AS/400 manual Displaying Data and Expressions, Stepping Through the Program Object

Stepping Through the Program Object

‡

ˆ

		Display Module		Source
Program:	DEBUGEX	Library:	MYLIB	Module:	DBGEX
141

142*=============================================================

143* Define the subprocedure Switch.

144*=============================================================

145	P Switch		B
146	D	Switch	PI
147	D	Parm	1A

148*---------------------------------------------------------

149* Define a local variable for debugging purposes.

150*---------------------------------------------------------

151	D Local	S	5A		INZ('aaaaa')
152
153	C	IF	Parm	= '1'
154	C	EVAL	Parm	= '0'
155	C	ELSE

Debug . . . _________________________________________________________________

_______________________________________________________________________________

F3=End program	F6=Add/Clear breakpoint		F10=Step	F11=Display variable
F12=Resume	F17=Watch variable	F18=Work with		watch	F24=More keys
Step completed at line 145.

—

˜

Figure 95. Stepping into Subprocedure Switch

Displaying Data and Expressions

You can display the contents of fields, data structures, and arrays evaluate expressions. There are two ways to display or evaluate:

¹F11 (Display Variable)

¹EVAL debug command

The

scope

of

the fields used in the

EVAL command can be defined b

QUAL command in languages such as ILE C.

However, this

command does no

currently

apply

to

ILE RPG,

Note:

You

cannot

display

return

values

because there

is

no external

able

for

use

with

the

EVAL

debug

command.

The

easiest

way

to

display

data

or

an

expression is to use F11

on the Display Module Source display. To

display a field using F11

able), place your cursor on the field that you want

to

display and

(Display variable).

The

current

value

of

the field is shown on the

the

bottom

of

the

Display Module

Source

display.

In cases where you are evaluating structures, records, or arrays, returned when you press F11 (Display variable) may span several lines that span several lines are shown on the Evaluate Expression display t entire text of the message. Once you have finished viewing the mes Evaluate Expression display, press Enter to return to the Display Modul display.

To display data using the EVAL debug command, type:

EVAL field-name

Chapter 11. Debugging Programs199