What does // mean in c++

// Represents a single-line comment in C, used to explain code, debug, and organize code structure. It starts with two slashes and comments the content until the end of the line.

//

In C, the "//" symbol indicates the beginning of a single-line comment. The remainder of the line is treated as a comment. Comments are not processed by the compiler and are used only to provide description and documentation for the code.

Purpose

• Explanation code: Used to describe the purpose of the code segment, the algorithm, or any other relevant information.
• Debugging: Used to temporarily disable lines of code to help isolate errors or problems.
• Organize your code: You can use comments to separate blocks of code, mark different features, or provide an overview of the structure of your code.

Format

Single-line comments should start with the "//" string, followed by a space. The content of the comment can be any text or code up to the end of the line.

Example

<code class="c++">// 打印一条消息到控制台
cout << "Hello, world!" << endl;

// 禁用以下代码行以调试
if (x == 10)  // 这行代码被注释掉了
{
    // ...
}</code>

Multi-line comments

For multi-line comments, you can use "/" and " /" symbol. Multiline comments can span multiple lines until the "*/" string is encountered.

<code class="c++">/*
 * 这是一个多行注释。
 * 可以跨越多行，直到遇到 "*/" 字符串为止。
 */</code>

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