Combining C's volatile and const keywords

Combining C's volatile and const keywords

Does it ever make sense to declare a variable in C or C++ as both volatile (in other words, "ever-changing") and const ("read-only")? If so, why? And how should you combine volatile and const properly? One of the most consistently popular articles on the Netrino website is about C's volatile keyword. The volatile keyword, like const, is a type qualifier. These keywords can be used by themselves, as they often are, or together in variable declarations. I've written about volatile and const individually before. If you haven't previously used the volatile keyword, I recommend you read "How to Use C's volatile Keyword" on Netrino.com before going on. As that article makes plain: "C's volatile keyword is a qualifier that is applied to a variable when it is declared. It tells the compiler that the value of the variable may change at any time--without any action being taken by th...

Full article: http://www.eetimes.com/discussion/barr-code/4236917/Combi...