How to use in c++

The & symbol in C performs a bitwise AND operation, the result is 1 if both bits are 1, and 0 otherwise. Additionally, it can obtain variable addresses and reference variables.

Usage of &

& symbol in C

The & symbol in C, that is, the bitwise AND operator, is used to perform a bitwise AND operation on two bit patterns. It does the following:

• If both bits are 1, the result is 1.
• If any bit is 0, the result is 0.

Syntax

The syntax of the bitwise AND operator is as follows:

int & (int x, int y);

Where:

• x and y are two integers to be bitwise ANDed.
• The return value is an integer containing the bitwise AND result of these two integers.

Example

int x = 5; // 二进制表示为 101
int y = 7; // 二进制表示为 111
int result = x & y; // 二进制表示为 101

std::cout << "x & y = " << result << std::endl; // 输出：5

In this example, x = 101 and y = 111, press After bitwise AND operation, result = 101 is obtained. This is because every bit in the two integers satisfies the bitwise AND rule.

Other usage

In addition to performing bitwise AND operations, the & symbol can also be used to:

• Get variables Address: Prefix & to the variable name to get the address of the variable. This is very useful with pointers and references.
• Reference variables: Suffix & to the type name to create a reference to the variable. A reference provides an alias to a variable, allowing it to be accessed under another name.

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