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 14. 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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