For example, never define a macro like this:

#define DANGER 60 + 2

This can potentially be dangerous when we do an operation like this:

int wrong_value = DANGER * 2; // Expecting 124

Instead, define like this because you don't know how the user of the macro may use it:

#define HARMLESS (60 + 2)

The example is trivial, but that pretty much explains my question. Are there any set of guidelines or best practices that you would recommend when writing a macro?

Thanks for your time!

c c-preprocessor
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