C and C++ SoftBench User's Guide

Using SoftBench Debugger
Examining and Changing Data in Your Program
Chapter 7184
in the "Debugger Input" input box. The tptr variable can then be used
in any expressions in the "()" input box. For example, if counter is an
integer in your program, you could store a pointer to it by entering
tptr = &counter
in the "()" input box, and selecting Print ( ). If you then enter "tptr" in the
"()" input box, you can print its value by selecting Print ( ), or print the
value of counter by selecting Print* ( ).
See "Help: DDE Reference" for detailed information on the declare
statement.
You can use these special variables as local memory. For example,
suppose your program defines a tree structure. To examine several nodes
under a node of the tree:
1. Create two DDE variables by entering "declare node-type *top,
*here" in the "Debugger Input" input box, using whatever node type
is appropriate for your tree.
2. Set top to the root of your tree, or wherever you want to start.
3. Traverse down to the node of interest by setting here to top->left or
whatever is appropriate for your example.
4. View or modify the here node of the tree, using Print ( ), Print* ( ), and
any other appropriate commands.
5. When you finish accessing the current node, set here to the next node
you want to work with (such as top->right or here->left).
Enter "list declarations" into the "Debugger Input" input box to list
all DDE variables you have defined in the Debugger Output Area. You
can scroll this area to examine them if you have more than fit in the
screen area.
Using Expressions
Expressions are composed of any combination of variables, constants,
and operators. SoftBench Debugger keeps track of the language the
program was written in, and recognizes language-specific operators used
by that language.
You can change the language used by DDE to evaluate expressions using
the DDE "prop lang" command. "list prop lang" shows the current
language. See "Help: DDE Reference" for detailed information.