What does x- mean in c language?

In C language, x- represents the bitwise negation operator, which turns 0 into 1 and 1 into 0 in the binary bits. It acts on an operand, and the syntax is ~. Application scenarios include creating masks to clear specific values, converting integers to two's complement, and performing bit-level conversions.

The meaning of x- in C language

In C language, x- represents bitwise negation operation symbol. Its function is to invert each binary bit in the expression or variable, that is, it turns 0 into 1 and 1 into 0.

Operation rules

The bitwise negation operator acts on a single operand (expression or variable). The operation rules are as follows:

• If the binary bit of the operand is 0, the result bit is 1.
• If the binary bit of the operand is 1, the result bit is 0.

Syntax

The syntax of the bitwise negation operator is as follows:

<code class="c">~<表达式或变量></code>

Among them, the angle brackets represent the operand of the operator.

Example

Consider the following example:

<code class="c">int x = 5; // 二进制表示为 0101
int y = ~x; // 按位取反，结果为 1010</code>

In this case, the value of y will be 10 (-6).

Purpose

The bitwise negation operator has a wide range of applications in C, including:

• Creating masks to clear A specific value in a binary bit.
• Convert an integer to its two's complement (negative value).
• Perform bit-level conversions, such as converting enumeration types to their integer values.

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