Why in the first place do you need to check the over or underflow? What sort of app would need it?
--- Shantanoo <[EMAIL PROTECTED]> wrote: > On Fri, 24 Sep 2004 19:17:10 +0530, Vishal Rao > <[EMAIL PROTECTED]> wrote: > > Hi, > > > > How to detect arithmetic overflow/underflow in C > and C++? > > > > For example, if I do something like this: > > > > unsigned i = 0; > > i--; > > new value is i is 4294967295 (max value of > unsigned). > > > > > > Whats a good way to detect/catch/trap the > underflow? > > > > Right now I do something like: > > > > unsigned iPrev = i; > > i--; > > if (iPrev<i) return MYERROR_UNDERFLOW; > > Whenever there is increment, store that value in > iPrev. and Before > increment, check new value is greater than iPrev. > > Can't understand your exact prob. So maybe this is > vague answer. > Why not write a function > ModifyVariable(newValue,oldValue) which will > take care of all necessary things? > > > > > Cheers, > > Vishal > > > -- > ______________________________________________________________________ > Pune GNU/Linux Users Group Mailing List: > ([EMAIL PROTECTED]) > List Information: > http://plug.org.in/mailing-list/listinfo/plug-mail > Send 'help' to [EMAIL PROTECTED] for > mailing instructions. > __________________________________ Do you Yahoo!? Yahoo! Mail is new and improved - Check it out! http://promotions.yahoo.com/new_mail -- ______________________________________________________________________ Pune GNU/Linux Users Group Mailing List: ([EMAIL PROTECTED]) List Information: http://plug.org.in/mailing-list/listinfo/plug-mail Send 'help' to [EMAIL PROTECTED] for mailing instructions.
