Top "Preprocessor-directive" questions

What does #line mean?

What does the following line do? #line 25 "CSSGrammar.y" And what's with the extension?

c++ c-preprocessor preprocessor-directive

How to use #if to decide which platform is being compiled for in C#

In C++ there are predefined macros: #if defined(_M_X64) || defined(__amd64__) // Building for 64bit target const unsigned long MaxGulpSize = 1048576 * 128;// …

c# 32bit-64bit preprocessor-directive

C++ compile time macros to detect windows os

Are there any C++ compile time macros which exists to detect which Windows OS the code is being compiled on. …

c++ windows windows-7 header preprocessor-directive

What is double evaluation and why should it be avoided?

I was reading that in C++ using macros like #define max(a,b) (a > b ? a : b) can result …

c++ macros preprocessor-directive