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May 14, 2011 · What is the point of #define in C++? I've only seen examples where it's used in place of a "magic number" but I don't see the point in just giving that value to a variable instead. In other words, when the compiler starts building your code, no #define statements or anything like that is left. A good way to understand what the preprocessor does to your code is to get hold of the. How can I use #if inside #define in the C preprocessor? Asked 15 years, 8 months ago Modified 10 months ago Viewed 52k times The question is if users can define new macros in a macro, not if they can use macros in macros. Nov 4, 2009 · Which one is better to use among the below statements in C? static const int var = 5; or #define var 5 or enum { var = 5 };

Jun 18, 2012 · #define WIDTH 10 is a preprocessor directive that allows you to specify a name (WIDTH) and its replacement text (10). The preprocessor parses the source file and each occurrence of the. Is there a way to do a #define inside of another #define? Asked 15 years, 6 months ago Modified 7 years ago Viewed 59k times As far as I know, what you're trying to do (use if statement and then return a value from a macro) isn't possible in ISO C. but it is somewhat possible with statement expressions (GNU extension). Since. Oct 28, 2009 · Is it better to use static const variables than #define preprocessor? Or does it maybe depend on the context? What are advantages/disadvantages for each method?