How to use the PI constant in C++ - Stack Overflow
Nov 13, 2009 · I want to use the PI constant and trigonometric functions in some C++ program. I get the trigonometric functions with include <math.h>. However, there doesn't seem to be …
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 …
Define a preprocessor macro through CMake - Stack Overflow
Jan 26, 2012 · How do I define a preprocessor variable through CMake? The equivalent code would be #define foo.
How do I show the value of a #define at compile-time?
I know that this is a long time after the original query, but this may still be useful. This can be done in GCC using the stringify operator "#", but it requires two additional stages to be defined first. …
Why do most C developers use define instead of const?
Mar 4, 2017 · #define simply substitutes a name with its value. Furthermore, a #define 'd constant may be used in the preprocessor: you can use it with #ifdef to do conditional compilation …
How do I define a function with optional arguments?
How do I define a function with optional arguments? Asked 13 years, 7 months ago Modified 1 year, 3 months ago Viewed 1.2m times
define volumes in docker-compose.yaml - Stack Overflow
Aug 4, 2021 · Mapped volumes can either be files/directories on the host machine (sometimes called bind mounts in the documentation) or they can be docker volumes that can be managed …
c - #ifdef inside #define - Stack Overflow
I am trying to write something like this: #define COV_ON(x) \ #ifdef COVERAGE_TOOL \ _Pragma (COVERAGE #x) #endif Is there any way to define COV_ON like this? I know what I …
Advantage and disadvantages of #define vs. constants?
Dec 22, 2009 · Can someone point out the advantages and disadvantages of using #define versus constants? Most of my work is done in C and Objective-C.
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 …