yeah,,,,the OS shouldn't grant permission to change a memory which doesn't belong to u..... On Sun, Aug 7, 2011 at 9:03 PM, sukran dhawan <[email protected]>wrote:
> 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. > 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. 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