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When is it appropriate to include a type conversion in a symbolic constant/macro, like this:
#define MIN_BUF_SIZE ((size_t) 256)
Is it a good way to make it behave more like a real variable, with type checking?
When is it appropriate to use the L or U (or LL) suffixes:
#define NBULLETS 8U
#define SEEK_TO 150L
You need to do it any time the default type isn’t appropriate. That’s it.