You are wrong. The above program invokes undefined behavior. Read the standard language draft to know about sequence points, side effects and undefined behavior.
Between a previous and next sequence point a variable's value cannot be modified twice. c-faq should be quite useful http://c-faq.com/~scs/cgi-bin/faqcat.cgi?sec=expr On Aug 3, 5:20 pm, Puneet Gautam <[email protected]> wrote: > As we know: > In an expression, if pre n post occur > simultaneously, pre inc the value then n there only n post executes it > after that expression...and expression evaluates right to left... > > Also, the value of a variable in an expression can be modified > multifold times...there is no restriction on dat... > > Here in this code: > Print statement No.: > > 1. i++*i++ is equivalent to: > output i*i(7*7) > followed by > i=i+1; > i=i+1; > prior to 2nd printf statement..that makes i=9 > > 2. i++*++i > expn. evaluates right to left: i inc. by one due to pre.. > i is now 10 . > output i*i(10*10) > i=i+1 (due to post inc., it inc. the value after the output) > i is now 11 > > 3. ++i*i++ > right to left evaluation, but post inc. increases value only after > output.. > coming to ++i in the expn., i inc. to 12 > output: 12*12 > i=i+1(due to postinc.) > i is now 13 > > 4. ++i*++i > both pre inc operators, order of evaluation doesnt ,matter: > i=i+1 > i=i+1 > output: 15*15 > > i finishes at 15 > > Hence the output: > 49 > 100 > 144 > 225 > > I think i made it clear.. > Feel free to point any loopholes.. > > Thanks. > > On 8/3/11, ankit sambyal <[email protected]> wrote: > > > > > > > > > Its compiler dependent. Acc. to the C standard an object's stored value can > > be modified only once in an expression. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Algorithm Geeks" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group at > >http://groups.google.com/group/algogeeks?hl=en. -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
