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Answers and rating deltas for

How to resolve the compilation error here - for the observer pattern in C++?

Author Votes Δ
chrisb2244 1 +4.16
Ali Kazmi 0 -0.99
Rupesh Yadav. 0 -1.49
Sambuca 0 -1.68
Last visited: Apr 28, 2015, 9:55:36 AM