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Andy Peters
06/01/12 11:43
Read: 671 times
Tucson, Az
USA


 
#187600 - me too
Responding to: ???'s previous message
Justin Fontes said:
Per said:
An expression with multiple || will (and must) end evaluation on first true.
An expression with multiple && will (and must) end evaluation on first false.


Completely true. This is called Short-circuit evaluation and details can be found here:

http://en.wikipedia.org/wiki/Shor...evaluation

Pretty good for being able to point to this out, Per.


Excellent, thanks for the clear explanation.

-a


List of 33 messages in thread
TopicAuthorDate
Where can one learn Intermediate C techniques for 8051      David Good      05/22/12 17:42      
   on the right track        Maarten Brock      05/23/12 06:11      
      one more thing      Erik Malund      05/23/12 07:15      
         Not uncommon bid bad coding standards to comply with      Per Westermark      05/23/12 08:14      
         Not afraid of globals, but...      David Good      05/23/12 10:07      
   More keil optimizer interesting tidbits      David Good      05/24/12 16:24      
      optimization      Maarten Brock      05/25/12 05:35      
      nothing gained, nothing lost      Erik Malund      05/25/12 07:53      
         I don't      Per Westermark      05/25/12 07:58      
            you can do both      Erik Malund      05/25/12 09:44      
               That is not helping the compiler      Justin Fontes      05/25/12 16:31      
                  exact same      Maarten Brock      05/26/12 03:36      
                     Technically, they are not the same      Justin Fontes      05/26/12 11:17      
                        Hmmm...      Andy Neil      05/26/12 23:46      
                        C don't do full evaluation of logical expressions      Per Westermark      05/28/12 06:33      
                           In discrete mathematics proving one is not a proof      Justin Fontes      05/28/12 14:02      
                              Lazy evaluation demanded        Per Westermark      05/28/12 14:51      
                                 I have learned something new because of this      Justin Fontes      05/28/12 17:54      
                                    me too      Andy Peters      06/01/12 11:43      
                                       Very Important      Michael Karas      06/01/12 14:30      
                              Breaks.      Michael Karas      05/28/12 17:57      
                                 Compile the code      Justin Fontes      05/28/12 18:28      
                                    To be more exact      Justin Fontes      05/28/12 19:11      
                                       Stop It!!        Michael Karas      05/28/12 22:01      
                                          That is exactly what I intended      Justin Fontes      05/29/12 10:16      
                                             Switch Break.      Michael Karas      05/29/12 22:04      
               obfusciating code to help the compiler is a VERY bad idea      Andy Neil      05/27/12 07:13      
                  the source of this      Erik Malund      05/27/12 07:17      
   Where can one learn Intermediate C techniques for 8051      Andy Neil      05/26/12 23:56      
   Getting the least out of your compiler        Andy Neil      05/27/12 07:25      
      Maybe IAR should follow their own advice?      Christoph Franck      05/30/12 02:05      
         provided the case ...      Maarten Brock      05/30/12 06:29      
            Compilers not knowing the target chip.      Christoph Franck      05/31/12 03:19      

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