Well a "double" pointer (A more accurate term is multidimensional pointer, in this case a two dimensional pointer) is basically a pointer to an array of pointers.
So, int **ptr basically says, ptr is a pointer to an array of pointers. And you can allocate memory to each of these pointers individually. See the image. Heres something interesting. int **ptr; *ptr = new int*[3]; // ptr points to THREE << pointers to integers >> ptr[0] = new int [10]; ptr[1] = new int[23]; ptr[2] = new int[12]; On Sat, Jul 23, 2011 at 1:29 AM, Kamakshii Aggarwal <kamakshi...@gmail.com>wrote: > @rakib:can u please explain ur answer > > > On Sat, Jul 23, 2011 at 12:48 AM, Pankaj <jatka.oppimi...@gmail.com>wrote: > >> https://ideone.com/tr3Q7 >> >> >> On Sat, Jul 23, 2011 at 12:42 AM, Pankaj <jatka.oppimi...@gmail.com>wrote: >> >>> double **p= (double **) malloc(sizeof(double *)); >>> >>> >>> On Sat, Jul 23, 2011 at 12:40 AM, Bhavesh agrawal <agr.bhav...@gmail.com >>> > wrote: >>> >>>> double pointer mean like **p >>>> >>>> hoe to allocate memory for this >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Algorithm Geeks" group. >>>> To post to this group, send email to algogeeks@googlegroups.com. >>>> To unsubscribe from this group, send email to >>>> algogeeks+unsubscr...@googlegroups.com. >>>> 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 algogeeks@googlegroups.com. >> To unsubscribe from this group, send email to >> algogeeks+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > > > -- > Regards, > Kamakshi > kamakshi...@gmail.com > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algogeeks@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com. > 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 algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
<<attachment: 2d.jpg>>
