Let x be an unsigned int on a machine with 4-byte unsigned ints. What effect does x>>=1;
X<<=1;
Have?

Question

Let x be an unsigned int on a machine with 4-byte unsigned ints. What effect does x>>=1; X<<=1; Have? A) There is no effect. B) The leftmost bit of x is set to 0. C) The rightmost bit of x is set to 0. D) Both (b) and (c).

Quizplus · Accepted Answer

The operations x>>=1 and x<<=1 are right and left bitwise shifts, respectively. The right shift x>>=1 divides x by 2, effectively setting the rightmost bit to 0. The left shift x<<=1 multiplies x by 2, which can change the leftmost bit but does not guarantee setting it to 0; it shifts all bits to the left, inserting a 0 at the rightmost position, thus also ensuring the rightmost bit is set to 0.

Let X Be an Unsigned Int on a Machine with 4-Byte