“Home In” on the Error
If you can go directly to the part of the program that has the error and search for it there, you can save yourself a lot of debugging time, as well as make hundreds of thousands of dollars as a professional debugger. In real life, we can’t always go straight to the error. What we often do is eliminate parts of the program that could be in error and, by the process of elimination, arrive at the part of the program that must contain the error, no matter how difficult to see. Then all the debugging effort can be invested in this part of the code. Needless to say, it is very important to assure yourself that you really have eliminated the other blocks of code. Otherwise, you might be focusing your attention on a part of the program that is actually OK.
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