What is the purpose of the #define directive in C++?
May 10, 2010 · 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 …
c++ - Declaring a function using #define - Stack Overflow
Jul 9, 2018 · The #define version is still a macro. The code is expanded at the invocation site. It has all the expected problems (with macros) including namespace pollution and unexpected …
Explicitly Define Datatype in Python Function - Stack Overflow
Explicitly Define Datatype in Python Function Asked 8 years, 3 months ago Modified 2 years, 1 month ago Viewed 101k times
Static, define, and const in C - Stack Overflow
2 #define is a preprocessor operation and will cause all occurrences of m to be replaced by 30000 before the compilation phase happens. The other two examples are bona fide variables. The …
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 - "static const" vs "#define" vs "enum" - Stack Overflow
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 };
c++ - How to define NULL using #define - Stack Overflow
Jun 16, 2011 · The question was 'how to define NULL using #define in C++ and C', as I understood it, it wasn't 'what to do with NULL if I wait till someone implements c++0x well', or …
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 …
Array format for #define (C preprocessor) - Stack Overflow
Array format for #define (C preprocessor) Asked 12 years, 9 months ago Modified 4 years, 3 months ago Viewed 96k times
Why are #ifndef and #define used in C++ header files?
I have been seeing code like this usually in the start of header files: #ifndef HEADERFILE_H #define HEADERFILE_H And at the end of the file is #endif What is the purpose of this?