c語言中的運算符及其含義

1)＆(按位與) (1) & (bitwise AND))

It does AND on every bit of two numbers. The result of AND is 1 only if both bits are 1.

它對兩個數字的每一位進行“與”運算。 僅當兩個位均為1時，AND的結果才為1。

Example:

例：

    4 & 7
4 → 00000100
7 → 00000111
Doing AND for each bit
From LSB:
0 & 1= 0 (LSB of output)
0 & 1= 0
1 & 1= 1
0 & 0 =0
0 & 0 =0
0 & 0 =0
0 & 0 =0
0 & 0 =0
Thus output:
00000100 → 4
4 & 7 =4

2)| (按位或) (2) | (bitwise OR))

It takes two numbers as operands and does OR on every bit of two numbers. The result of OR is 1 any of the two bits is 1.

它使用兩個數字作為操作數，并對兩個數字的每一位進行“或”運算。 OR的結果為1，兩個位中的任何一個為1。

Example:

例：

    4 | 7
4 → 00000100
7 → 00000111
Doing OR for each bit
From LSB:
0 | 1 =1 (LSB of output)
0 | 1 =1
1 | 1 =1
0 | 0 =0
0 | 0 =0
0 | 0 =0
0 | 0 =0
0 | 0 =0
Thus output:
00000111 → 7
4 | 7 =7

3)^(按位XOR) (3) ^ (bitwise XOR))

It does XOR on every bit of two numbers. The result of XOR is 1 if the two bits are different.

它對兩個數字的每一位執行XOR。 如果兩個位不同，則XOR的結果為1。

Example:

例：

    4 ^ 7
4 → 00000100
7 → 00000111
Doing XOR for each bit
From LSB:
0 ^ 1 =1 (LSB of output)
0 ^ 1 =1
1 ^ 1 =0
0 ^ 0 =0
0 ^ 0 =0
0 ^ 0 =0
0 ^ 0 =0
0 ^ 0 =0
Thus output:
00000011 → 3
4 ^ 7 =3

4)<<(左移) (4) << (left shift))

It takes two operands, left shifts the bits of the first operand, the second operand decides the number of places to shift. In every left shift all bits are shifted to left adding a logical 0 at LSB.

它需要兩個操作數，左移第一個操作數的位，第二個操作數確定要移位的位數。 在每個左移中，所有位都向左移，在LSB處加邏輯0。

Example:

例：

    4<<1
Before 1 left shift
00000100
After 1 left shift
00001000 → 8
So 4<<1 = 8

5)>>(右移) (5) >> (right shift))

It takes two numbers, right shifts the bits of the first operand, the second operand decides the number of places to shift.

它需要兩個數字，右移第一個操作數的位，第二個操作數確定要移位的位數。

    4>>1
Before 1 right shift
00000100
After 1 right shift
00000010 → 2
So 4<<1 = 2

6)?(按位非) (6) ~ (bitwise NOT))

It takes one operand and inverts all bits of it

它需要一個操作數并將其所有位求反

Example:

例：

    ~4
00000100 → 11111011
~4=251

翻譯自: https://www.includehelp.com/c/bitwise-operators-and-their-working-with-examples-in-c.aspx

c語言中的運算符及其含義