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Answers and rating deltas for

How do you declare x and y so that x+=y gives a compilation error and x=x+y not?

Author Votes Δ
Craigy 54 +0.82
irreputable 3 -0.14
Bhushan 2 -0.73
gprathour 1 -4.25
Last visited: Sep 14, 2014, 5:07:29 AM