..so, instead of linuxcnc, emc++? --- On Thu, 3/8/12, Jan de Kruyf <jan.de.kr...@gmail.com> wrote:
> From: Jan de Kruyf <jan.de.kr...@gmail.com> > Subject: Re: [Emc-users] linuxcnc, possibly bug, or global isn't global > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Date: Thursday, March 8, 2012, 3:40 AM > Gene, > I dont know, but sometimes Cprogrammers designing a new > (linuxcnc) language > seem to be infected by C rules. > > So K&R says that the scope of a variable does not extend > outside the block > where it is defined (read: first assigned to, in this case) > > Now a compound statement (a sequence of statements) under an > if, else, for, > while, do, etc. construct is such a block. > > Quite logical really, beause who says that the program willl > follow the > exact path through the block where you first defined your > variable. > > so better safe than sorry and the variable goes up in smoke > as soon as you > leave such a block. > > AND if there was a variable with the same name before you > entered this > block, that var will come back alive. > while inside the block it was in hybernation, because you > called a new > variable with the same name into being, by assigning to it. > > j. > > > On Thu, Mar 8, 2012 at 1:22 AM, gene heskett <ghesk...@wdtv.com> > wrote: > > > On Wednesday, March 07, 2012 06:16:33 PM Mark Wendt did > opine: > > > > > On 03/07/2012 08:22 AM, gene heskett wrote: > > > > See my previous msg Karl, I believe I have it > working. But its too > > > > cold in the shop to expect vactra to act warm > enough for the > > > > feedrates, so all I am doing ATM is cutting > virtual air. ;) > > > > > > > > Thanks. > > > > > > > > As for this problem, from the clues I'm > picking up here, if a global > > > > variable is created/adjusted inside of an > onumber while, its gone when > > > > the corresponding onumber endwhile is > finished. That is the only > > > > conclusion I can come to that fits the > observed results. > > > > > > > > IMO, if its defined globally, as in > #<_name>, even if its inside a > > > > "while/endwhile" then it s/b globally > usable. Such seems not to be > > > > the case. So it seems to be at odds > with the docs in this regard. > > > > Fixing that, could even fix the exit crashing > I'm getting maybe? As > > > > in a screwed up stack? > > > > > > > > Cheers, Gene > > > > > > Gene, > > > > > > How are you returning the value of the global > variable after you exit > > > the loop? Perhaps you need an assignment > statement prior to the exit of > > > the loop to ensure you are returning the value you > want? Crazy things > > > can happen inside those things to global > variables. > > > > > > mark > > > > I had been assuming that it was whatever it was inside > the loop, when the > > loop fell through. That didn't turn out to be > overly reliable as it was > > often the same value as before the loop, even if it had > been modified 360k > > times inside the loop. > > > > Cheers, Gene > > -- > > "There are four boxes to be used in defense of > liberty: > > soap, ballot, jury, and ammo. Please use in that > order." > > -Ed Howdershelt (Author) > > My web page: <http://coyoteden.dyndns-free.com:85/gene> > > mummy, n.: > > An Egyptian who was pressed > for time. > > > > > > > ------------------------------------------------------------------------------ > > Virtualization & Cloud Management Using Capacity > Planning > > Cloud computing makes use of virtualization - but cloud > computing > > also focuses on allowing computing to be delivered as a > service. > > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Virtualization & Cloud Management Using Capacity > Planning > Cloud computing makes use of virtualization - but cloud > computing > also focuses on allowing computing to be delivered as a > service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
