什么是〜位运算符的功能（波浪号） [英] What's the function of the ~ bitwise operator (Tilde)
问题描述
可能重复：结果
这是什么〜运算符的意思是在这里吗？结果
<一href=\"http://stackoverflow.com/questions/8785054/bit-not-operation-in-phpor-any-other-language-probably\">Bit在PHP中没有操作（或任何其他语言可能）有人可以解释我在PHP中的
〜运营商？我知道这是一个 NOT-运营商的，但为什么PHP转换下面的语句来负变量减一的价值？$ a = 1;回声〜$一个//回声-2
$ A = 2;回声〜$ //一-3回声
$一= 3;回声〜$一个//回声-4
解决方案这就是所谓的的补算术的。你可以阅读关于它的详细这里。
运营商
〜是一个二元反运算符（而不是布尔非），以及在于，它逆操作数的所有位。其结果是在二的补码算术负数。Possible Duplicate:
What does this ~ operator mean here?
Bit not operation in PHP(or any other language probably)Can someone explain me the
~operator in PHP? I know it's a NOT-operator, but why does PHP convert following statement to the negative value of the variable minus one?$a = 1; echo ~$a // echo -2 $a = 2; echo ~$a // echo -3 $a = 3; echo ~$a // echo -4
解决方案This is called the two's complement arithmetic. You can read about it in more detail here.
The operator
~is a binary negation operator (as opposed to boolean negation), and being that, it inverses all the bits of its operand. The result is a negative number in two's complement arithmetic.这篇关于什么是〜位运算符的功能（波浪号）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
