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Answers and rating deltas for

What is the purpose of a single pound/hash sign (#) on its own line in the C/C++ preprocessor?

Author Votes Δ
Jonathan Wakely 149 +0.80
P45 Imminent 96 +1.53
too honest for this site 48 -0.92
Last visited: May 5, 2016, 1:08:50 PM