Why Use Namespaces in C++?

Namespaces provide several benefits in C++:

1. They help avoid naming conflicts between identifiers (variables, functions, classes, etc.) defined in different parts of a program or different libraries.
2. They allow you to logically group related code elements together, making your code more organized and readable.
3. They provide a way to create separate scopes for identifiers, so you can use the same name for different things in different contexts.

You should use namespaces:

• When writing libraries or modules that will be used in other projects, to avoid potential naming clashes.
• To group related functionality together and make your code more modular.
• When working on large codebases, to minimize the risk of accidentally using the same identifier for different purposes.

For example:

1namespace MyLibrary {
2  void Foo() {
3    // Function code
4  }
5}
6
7namespace YourLibrary {
8  // Different function with the same name
9  void Foo() {  
10    // Function code
11  }
12}
13
14int main() {
15  // Calls the Foo function from MyLibrary
16  MyLibrary::Foo();
17
18  // Calls the Foo function from YourLibrary
19  YourLibrary::Foo();
20}