c++ - Why use #define instead of a variable - Stack Overflow
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.
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 …
How can I use #if inside #define in the C preprocessor?
How can I use #if inside #define in the C preprocessor? Asked 15 years, 5 months ago Modified 7 months ago Viewed 51k times
Is it possible to use a if statement inside #define?
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 …
Difference between `constexpr` and `#define` - Stack Overflow
Feb 12, 2021 · So I read the interesting answers about what are the differences between constexpr and const but I was curious about are the differences between #define and …
What is the difference between #define and const? [duplicate]
The #define directive is a preprocessor directive; the preprocessor replaces those macros by their body before the compiler even sees it. Think of it as an automatic search and replace of your …
How do I define a function with optional arguments?
How do I define a function with optional arguments? Asked 13 years, 8 months ago Modified 1 year, 4 months ago Viewed 1.2m times
MSBuild: set a specific preprocessor #define in the command line
Our solution was to use an environment variable with /D defines in it, combined with the Additional Options box in Visual Studio. In Visual Studio, add an environment variable macro, …
c - #Define VS Variable - Stack Overflow
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 …
c# - How do you use #define? - Stack Overflow
Oct 30, 2013 · 8 #define is used to define compile-time constants that you can use with #if to include or exclude bits of code.