Algorithms | Bit Algorithms | Question 2
What does the following C expression do?
x = (x<<1) + x + (x>>1);
(A) Multiplies an integer with 7
(B) Multiplies an integer with 3.5
(C) Multiplies an integer with 3
(D) Multiplies an integer with 8
Answer: (B)
Explanation: The expression multiplies an integer with 3.5. For example, if x is 4, the expression returns 15. If x is 6, it returns 21. If x is 5, it return 17. See Multiply a given Integer with 3.5 for more details.
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