Unless you want to shift a byte left by a variable amount, and zero is the correct answer if you're shifting by eight. Then you either need to hope that your platform just uses a shift-left instruction (giving you zero), or you have to add a test (consuming expensive clock ticks).
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No, C will *never* give zero as an (intermediate) answer, due to its promotion rules as explained by other posters. Of course *assigning* (n --
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