Page 317 - DCAP404 _Object Oriented Programming

Object-oriented Programming

Notes
Figure 14.1

A closely related technique is that of inserting several unique printf statements, such as

Printf(“debugging - line 1/n”);
Printf(“Debugging - line 2/n”);
etc. at various places within the program. When the program is executed, the debug messages
will indicate the approximate location of the error.

Notes The source of the error will lie somewhere between the last printf statement whose
message did appear, and the first printf statement whose message did not appear.

Watch Values

A watch value is the value of a variable or an expression which is displayed continuously as the
program executes. Thus, you can see the changes in a watch value as they occur, in response to
the program logic. By monitoring a few carefully selected watch values, you can often determine
where the program begins to generate incorrect or unexpected values.
Breakpoints

A breakpoint is a temporary stopping point within a program. Each breakpoint is associated
with a particular instruction within the program. When the program is executed, the program

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