What is | in c++

The | (pipe character) in C is a bitwise operator, used to perform a bitwise OR operation on the corresponding bits of two integers, that is, if at least one is non-0, the result is 1.

What is | in C |

The | (pipe character) in C is a bit operator, used Performs a bitwise OR operation on the corresponding bits of two integers.

Bitwise OR operation

The bitwise OR operation performs a logical OR operation on the corresponding bits of two binary numbers, that is:

• If both bits are 0, the result is 0.
• If at least one bit is non-0, the result is 1.

Usage

The pipe character (|) is used to perform a bitwise OR operation on the binary representation of two integers. The syntax is as follows:

<code class="cpp">result = a | b;</code>

where:

• a and b are the two integers to be bitwise ORed.
• result is the result of the operation.

Example

Consider the following example:

<code class="cpp">int a = 5; // 二进制表示：0101
int b = 3; // 二进制表示：0011

int result = a | b; // 按位或运算</code>

The result of the bitwise OR operation is:

<code>0101 (a)
0011 (b)
------
0111 (result)</code>

Therefore, The value of result is equal to 7 (0111 in binary).

Application

The bitwise OR operation has many applications in C, for example:

• Setting the flag bit
• Extract specific bits
• Combined bit mask

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