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 can I use #if inside #define in the C preprocessor?
How can I use #if inside #define in the C preprocessor? Asked 15 years, 6 months ago Modified 8 months ago Viewed 51k times
error Please #define _AFXDLL or do not use /MD [d] occurs even …
Jul 30, 2014 · Why don't you just do what it says and #define _AFXDLL? C/C++, Preprocessor, Preprocessor Definitions setting.
c# - How do you use #define? - Stack Overflow
Oct 30, 2013 · The main use-case for #define is for conditional compilation (where it can be very useful). You're correct that using #define for symbols and (please don't do it) macros, is not a …
c preprocessor - Is there a good reason for always enclosing a …
#define _add_penguin(a) penguin ## a #define add_penguin(a) _add_penguin(a) #define WIDTH (100) #define HEIGHT 200 add_penguin(HEIGHT) // expands to penguin200 …
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, …
What is the scope of a #define? - Stack Overflow
Jul 6, 2016 · What is the scope of a #define? I have a question regarding the scope of a #define for C/C++ and am trying to bet understand the preprocessor. Let's say I have a project …
c - Type of #define variables - Stack Overflow
Dec 21, 2011 · If I have: #define MAXLINE 5000 What type is MAXLINE understood to be? Should I assume it is an int? Can I test it somehow? In general, how can one determine the …
c - #define or enum? - Stack Overflow
Jun 29, 2010 · Possible Duplicate: Why use enum when #define is just as efficient? When programming in C, is it better practice to use #define statements or enums for states in a state …