MSN: Are you in danger of getting chilblains? How to avoid the cold-weather condition Are you in danger of getting chilblains? How to avoid the cold-weather condition What is the point of #define in C++?

Understanding the Context

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++ - Why use #define instead of a variable - Stack Overflow The question is if users can define new macros in a macro, not if they can use macros in macros. 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 source code.

Key Insights

A const variable declaration declares an actual variable in the language, which you can use... well, like a real variable: take its address, pass it around, use it, cast/convert it, etc. Oh ... How do I define a function with optional arguments? Asked 14 years, 1 month ago Modified 1 year, 9 months ago Viewed 1.2m times Is it better to use static const variables than #define preprocessor?

Final Thoughts

Or does it maybe depend on the context? What are advantages/disadvantages for each method?