What are some common mistakes with preprocessor variables?

What are some common mistakes developers make with preprocessor variables?

Some common mistakes include not using the correct syntax, failing to define variables before use, and overusing them.

Can you give me an example of incorrect syntax?

Sure! A common mistake is forgetting to use the '#' symbol before defining a macro, like this: 'define MY_VAR 10' instead of '#define MY_VAR 10'.

What about variable scope issues?

Variable scope issues can arise when preprocessor variables are defined in a local context but expected to be used globally, leading to undefined behavior.

How can I avoid these mistakes?

To avoid these mistakes, always double-check your syntax, define variables in the correct scope, and use comments to clarify their purpose.