Thread: #Defining

Originally Posted by pc_doctor

Something thats bothering me - if a #define is referenced in two files with either the same value/different values, will this cause a complication error because the pre-processor will see two different values?

It sounds like the answer is no, but what exactly do you mean by "a #define is referenced in two files with either the same value/different values"? Providing an example would be a good idea. (Once you are able to come up with an example, you can then test it for yourself, assuming that by "complication error" you mean compile error.)

pretty sure that he means:

"will it cause an error to define two different values to the same name as long as it is done in two different files?"

ie, in file 1

#DEFINE foo bar

and in file 2

#DEFINE foo 5

Even if it doesn't, it should probably be avoided for the sake of clarity of the code.