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Question

Which of these expressions will return true if the input integer v is a power of two?

a.

(v | (v + 1)) == 0;

b.

(~v & (v – 1)) == 0;

c.

(v | (v – 1)) == 0;

d.

(v & (v – 1)) == 0;

Posted under Object Oriented Programming Using C++

Answer: (d).(v & (v – 1)) == 0;

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Q. Which of these expressions will return true if the input integer v is a power of two?
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