CHAPTER 1 How Failures Come to Be
Your program fails. How can this be? The answer is that the programmer creates a defect in the code. When the code is executed, the defect causes an infection in the program state, which later becomes visible as a failure. To find the defect, one must reason backward, starting with the failure. This chapter defines the essential concepts when talking about debugging, and hints at the techniques discussed subsequently—hopefully whetting your appetite for the remainder of this book.
1.1 MY PROGRAM DOES NOT WORK!
Oops! Your program fails. Now what? This is a common situation that interrupts our routine and requires immediate attention. Because the program mostly worked until now, we assume that something external ...
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