Casio FX-730P Owner's Manual page 81

4-6 Error Messages and Debugging
If an error occurs, specify the WRT mode by pressing ~
ITJ
after releasing the
error
by~
key and correct by calling the error line with the LIST command.
2. Debugging When Error Is Not Displayed
If the desired result cannot be obtained without any error message displayed,
there is a "bug" that does not become an error somewhere in the program. In
this case,
d~bugging
is carried out while executing the program.
• Debugging with the STOP Command
Since the program execution will pause if the STOP command is written imme-
diately after the line containing the variable to be checked, display and check
the contents of the variable by entering variable to be checked followed by
§I .
To continue executing the program, press
§1.
• Debugging with the TRACE Mode
Press
~ ~
and "TRACE ON" will be displayed. This mode is called the
TRACE mode. If a program is executed in the TRACE mode, there will be a
pause after each line (after each statement when using multistatements). Press
§I
to advance to the next execution.
The TRACE mode is used to find the bug by tracing the flow of the program.
Pressing
~QI
causes "TRACE ON" to disappear and cancel the TRACE
mode.
Other causes of bugs that can be considered are "errors in the variable" and
"errors in the subscript of an array variable". The program should therefore be
closely checked.
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