Locating the Bug
A simple search strategy for debugging is as follows:
- initially the whole program is "suspect"
- put a print statement in the middle of the suspect part of the
program to display values of variables at that point
- if the values are correct, then the bug must be in the second
part of the execution
- if the values are incorrect, the bug is in the first half
- now restrict your attention to just the relevant half of the
program (it becomes the new "suspect part of the program")
- repeat the above steps
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