There actually is a good reason not to use parens with sizeof, and it is in fact a means of introducing subtle bugs to your code if you don't know the differenc

There actually is a good reason not to use parens with sizeof, and it is in fact a means of introducing subtle bugs to your code if you don't know the difference: sizeof some_struct; //computed at *compile* time sizeof(some_struct); // also computed at *compile* time, but looks like its a runtime call Anything that looks like something but isn't actually that thing, in my opinion - especially with a language like C - is room for programmer enlightement ..