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by maxlybbert
2750 days ago
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“Divide by zero” is an exception in the math library. But a GUI calculator shouldn’t pass all input to the math library without parsing it first, and figuring out what the user wants and if the user has entered a valid statement. One guideline I follow for choosing between error codes and exceptions is “can the immediate caller do anything about this issue?” Even if the calculator does feed user input directly into the math library, the calculator can’t do anything sensible with an invalid statement. The calculator will have to “go up a level” and ask the user for help. |
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