better way is to allocate memory and use.that was pointers are desinged to do to support dymanic allocation
On Sun, Aug 7, 2011 at 9:01 PM, saurabh singh <[email protected]> wrote: > I wont consider it a problem....dats bad style to refer to something that u > have not reserved.... > > > On Sun, Aug 7, 2011 at 8:57 PM, sukran dhawan <[email protected]>wrote: > >> hmmm this is a kinda problem in linux systems.in windows it works >> properly. >> >> >> On Sun, Aug 7, 2011 at 8:54 PM, saurabh singh <[email protected]>wrote: >> >>> In that case ignore my post as idiotic....But if u dont declare space its >>> usually placed in a read only memory.....so that might be the >>> problem,,,,,Once again this can be an idiotic explanation...lets debug... >>> >>> On Sun, Aug 7, 2011 at 8:45 PM, Amol Sharma <[email protected]>wrote: >>> >>>> 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. >>>> >>> >>> >>> >>> -- >>> 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. >> > > > > -- > 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. 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