In C++, comments are used to provide explanations or notes in the code. They are not executed by the compiler and are ignored during program execution. There are two types of comments in C++:
1. Single-line comments: These start with two forward slashes (`//`) and continue until the end of the line.
2. Multi-line comments: These start with a `/*` and end with a `*/`. They can span multiple lines.
Here's an example of both types of comments in C++:
```cpp
#include
int main() {
// This is a single-line comment explaining the next line
std::cout << "Hello, World!" << std::endl; // Another single-line comment
/*
This is a multi-line comment explaining the following block of code.
It can span multiple lines without needing to use // at the beginning of each line.
*/
int x = 5;
int y = 10;
int sum = x + y;
std::cout << "The sum of x and y is: " << sum << std::endl;
return 0;
}
```
Remember that comments are meant for human readers and should be used to explain complex sections of code or provide additional information about the purpose of certain parts of the program.
2 个回答
In C++, comments are text that is not executed by the compiler. They are used to add explanations or notes to the code, which can help developers understand the purpose of the code better. There are two types of comments in C++:
1. Single-line comments: Any text following a double forward slash (//) on the same line is considered a single-line comment. Everything after the // is ignored by the compiler until the end of the line.
2. Multi-line comments: Text enclosed between a forward slash followed by an asterisk (/*) and an asterisk followed by a forward slash (*/) is treated as a multi-line comment. This type of comment can span multiple lines, and the compiler will ignore all text within this block.