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Answers and rating deltas for

What is the difference between these two C++ statements to concatenate a string?

Author Votes Δ
Thomas Sablik 2 +1.44
Bathsheba 2 +0.81
eerorika 1 -0.40
Vlad from Moscow 1 -0.13
Pete Becker 1 +0.21
Omid 0 -1.50
PeakyBlinder 0 -1.61
Acorn -1 -1.54
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