c++ - What does ## in a #define mean? - Stack Overflow 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 preprocessed output and look at it
Good Programming Practices for Macro Definitions (#define) in C 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, def
c++ - Why use #define instead of a variable - Stack Overflow 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
What is the purpose of the #define directive in C++? 0 in C or C++ #define allows you to create preprocessor Macros In the normal C or C++ build process the first thing that happens is that the PreProcessor runs, the preprocessor looks though the source files for preprocessor directives like #define or #include and then performs simple operations with them