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Run-Time Errors
Run-Time Errors
Run-Time Errors
Run-Time Errors
The first step in debugging your program is to run it. The graphing calculator
automatically checks each executed command for syntax errors. If there is an error, a
message indicates the nature of the error.
•
To display the program in the Program
Editor, press ¸. The cursor appears
in the approximate area of the error.
To cancel program execution and return to the Home screen, press N.
•
If your program allows the user to select from several options, be sure to run the
program and test each option.
Debugging Techniques
Debugging Techniques
Debugging Techniques
Debugging Techniques
Run-time error messages can locate syntax errors but not errors in program logic. The
following techniques may be useful.
•
During testing, do not use local variables so that you can check the variable values
after the program stops. When the program is debugged, declare the applicable
variables as local.
•
Within a program, temporarily insert
values of critical variables.
-
and
Disp
Pause
change the function into a program, change
. Use
EndPrgm
and change the program back into a function.
Pause
Programming
Disp
cannot be used in a user-defined function. To temporarily
and
to debug the program. Then remove
Disp
Pause
and
commands to display the
Pause
and
Func
EndFunc
to
and
Prgm
and
Disp
635
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