How do I use preprocessor variables in my code?

How do I use preprocessor variables in my code?

Preprocessor variables are used to define constants or configurations before the actual compilation of the code. You can define them using directives like #define in C/C++.

Can you give me an example of defining a preprocessor variable?

Sure! In C, you can define a variable like this: #define PI 3.14. Then, you can use PI in your code instead of the actual value.

What are the benefits of using preprocessor variables?

They help in maintaining code, making it easier to change values in one place, and can improve readability.

Are there any limitations I should be aware of?

Yes, preprocessor variables are not type-safe and can lead to errors if not used carefully. They also don't have scope like regular variables.