按位运算符简单地翻转整数中的所有位?
我必须翻转整数二进制表示中的所有位.给定:
I have to flip all bits in a binary representation of an integer. Given:
10101
输出应该是
01010
当与整数一起使用时,完成此操作的位运算符是什么?例如,如果我正在编写像 int flipBits(int n);
这样的方法,那么主体中会发生什么?我只需要翻转数字中已经存在的内容,而不是整数中的所有 32 位.
What is the bitwise operator to accomplish this when used with an integer? For example, if I were writing a method like int flipBits(int n);
, what would go in the body? I need to flip only what's already present in the number, not all 32 bits in the integer.
推荐答案
~
一元运算符是按位取反.如果您需要的位数少于 int
中的位数,那么您需要在事后使用 &
对其进行屏蔽.
The ~
unary operator is bitwise negation. If you need fewer bits than what fits in an int
then you'll need to mask it with &
after the fact.
相关文章