i can see the output coming as f ............. http://ideone.com/pB9ga
but when i ran the same code on ubuntu machine with gcc compiler then it is also giving segmentation fault i don' t know why.....this is a illustration taken from K & R page no. 132. i don't think there is any need to allocate memory for the string separately we have declared the variable of a structure which contains a character pointer....which points to the given string....so where is the need of allocating memory ?? -- Amol Sharma Third Year Student Computer Science and Engineering MNNIT Allahabad On Sun, Aug 7, 2011 at 8:36 PM, sukran dhawan <[email protected]>wrote: > oh ya i didnt it sorry :) > > > On Sun, Aug 7, 2011 at 8:29 PM, saurabh singh <[email protected]> wrote: > >> And also u have not allocated any space for str...so even if u do wat >> sukran has suggested u wont get an f... >> >> >> On Sun, Aug 7, 2011 at 8:27 PM, sukran dhawan <[email protected]>wrote: >> >>> replace ur code with printf("%c",++(p->str)); >>> *ptr is a deferenced value.but mere p is a lvalue >>> >>> >>> On Sun, Aug 7, 2011 at 8:23 PM, RAHUL AGARWAL <[email protected]>wrote: >>> >>>> #include<stdio.h> >>>> struct abc{ >>>> int len; >>>> char *str; >>>> }*p; >>>> main() >>>> { >>>> struct abc k; >>>> k.len=20; >>>> k.str="echo is your command"; >>>> p=&k; >>>> printf("%c",++(*p->str)); >>>> } >>>> I expect the output of this code to be "f" but it's displays >>>> "SEGMENTATION FAULT".. >>>> PLZ EXPLAIN.WHY? >>>> >>>> -- >>>> 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. >>> >> >> >> >> -- >> Saurabh Singh >> B.Tech (Computer Science) >> MNNIT ALLAHABAD >> >> >> >> -- >> 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. > -- 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.
