CP CVDT Q29

29If s and b are integers then purpose of the following program fragment is to
b = s + b ;
s = b - s ;
b = b - s ;

Option : C
Explanation : Swapping two integer variables means exchanging their values. If s initially contains 10 and b contains 20, after swapping, s contains 20 and b contains 10. A temporary variable is one common way to perform the exchange.

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