位移位，右移4位

Question

so I'm doing bit shifting for C

00001010 >> 4 shouldn't give 0000000?

because I'm shifting the bit to 4 times right, which is same as dividing by 4. but on my notes it says 10101000 is the notes wrong?

Answer 1

Your notes are wrong. printf("%d\\n", strtol("00001010", 0, 2) >> 4) produces “0”.

Answer 2

右移 00001010 bin（10月10日）4次将确实给您：00000000 bin（0 dec），而左移 4次：00001010 bin（10月10日）将给您：10100000 bin（160 dec 编辑 ）

Answer 3

Each shift is the same as dividing the value by 2. Shifting to the right four times is like dividing by 2 four times. It's integer math so any fractional portions are truncated.

Assuming 00001010 (10) is binary notation, the results are as follows:

Shift 1: 00000101 (5)
Shift 2: 00000010 (2)
Shift 3: 00000001 (1)
Shift 4: 00000000 (0)

So the result is indeed 0.