> From: Christopher Schultz [mailto:ch...@christopherschultz.net] > Subject: Re: [OT] JNI problem > > C99 probably allows this: > char s[20]; > sizeof s; > > To yield 20, while strict, old-skool C would yield whatever "sizeof > char*" would.
Not true; all versions of the C standard allowed the above, and all would evaluate to 20 for sizeof. Contrary to popular belief, arrays and pointers are not equivalent, although they can be interchanged in many circumstances - sizeof not being one of them. > In any case, it's always best to use strlen() to figure out how many > chars are in a string. It's not just best, it's mandatory. > I guess you mean dynamic sizing and not dynamic allocation. I said it was not dynamic allocation; dynamic sizing is not quite appropriate either, since the value is fixed for any given invocation of the function. > It appears that: > sizeof arr > compiles to the equivalent of: > val + sizeof char[6] Yes, that's what I was pointing out. > That's a pretty clever compiler. It's required by the standard; not sure which version it went into, since I've only kept the 1999 one. > Whatever happened to the days when compilers found ways to make > your life miserable instead of actually helping you out? ;) I believe that Visual Studio has cornered the make-your-life-miserable part of the market. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
