Size of #define values

Question

If a value is defined as

#define M_40 40

Is the size the same as a short (2 bytes) or is it as a char (1 byte) or

Answer 1

Preprocessor macros get literally swapped in during the preprocess stage of the compilation.

For example the code

#define N 5

int value = N;

will get swapped for

int value = 5;

when the compiler sees it. It does not have a size of its own as such