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Is exit(status) truly equivalent to returning the same status from main?
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Is exit(status) truly equivalent to returning the same status from main?
Yes and no. The Standard says that a return from the initial call to main is equivalent to calling exit. However, a return from main cannot be expected to work if data local to main might be needed during cleanup; A few very old, nonconforming systems may once have had problems with one or the other form. (Finally, the two forms are obviously not equivalent in a recursive call to main.)
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