C++ Bitwise Operator Understanding Code

Question

a &= ~(1 << 10);

上面的代码是否真的意味着：

a &= (0 << 10);

Answer 1

~ is bitwise inversion (take every 1 and turn it into 0, every 0 into 1), so if you have x = 0b0100 (assume 4 bit integers for a second), then ~x == 0b1011 . << is "shift this to the left", so '(1 << 2) == 0b0100`.