What are the best practices for using switch-case in C++?

What are the best practices for using switch-case in C++?

When using switch-case in C++, it's important to follow some best practices for clarity and efficiency. First, ensure that each case is unique to avoid ambiguity. Also, consider using 'break' statements to prevent fall-through unless intentional. Additionally, keep your cases simple and avoid complex logic within them.

Can you explain why fall-through might be useful?

Fall-through can be useful when multiple cases should execute the same block of code. For example, if you want to handle several values in the same way, you can stack them without repeating code. Just be cautious, as it can lead to bugs if not documented properly.

Are there any alternatives to switch-case?

Yes, alternatives include using if-else statements or polymorphism, especially when dealing with complex conditions or when the number of cases is large. Each method has its own advantages depending on the context.

What about performance? Is switch-case faster than if-else?

In many cases, switch-case can be faster than if-else, especially when there are many conditions. This is because compilers can optimize switch statements into jump tables, allowing for quicker access. However, the actual performance can depend on the specific scenario and compiler optimizations.