^ (XOR) 运算符有什么作用? [英] What does the ^ (XOR) operator do?

问题描述

XOR 执行什么数学运算?

What mathematical operation does XOR perform?

推荐答案

XOR 是一个二元运算，它代表异或"，也就是说如果恰好 one 位已设置.

XOR is a binary operation, it stands for "exclusive or", that is to say the resulting bit evaluates to one if only exactly one of the bits is set.

这是它的功能表:

a | b | a ^ b
--|---|------
0 | 0 | 0
0 | 1 | 1
1 | 0 | 1
1 | 1 | 0

此操作在一个数的每两个对应位之间执行.

This operation is performed between every two corresponding bits of a number.

示例:7 ^ 10
二进制:0111 ^ 1010

  0111
^ 1010
======
  1101 = 13

性质:该操作是可交换的、结合的和自逆的.

Properties: The operation is commutative, associative and self-inverse.

也和加法模2一样.

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