what s silly mistake. @Rahul thanks for correcting me. On Tue, Jul 3, 2012 at 3:41 PM, rahul ranjan <[email protected]>wrote:
> @abhishek.... its wrong as arr1 is just a pointer o int and sizeof(arr1) > will always be 4 bytes(size of a pointer) regardless of number of bytes > allocated to it on heap.... > > > On Tue, Jul 3, 2012 at 3:14 PM, Abhishek Sharma <[email protected]>wrote: > >> arr1 = (int *)malloc(sizeof(int) * ncols); // memory allocated for 1st >> row >> arr2 = (int **)malloc(sizeof(arr1) * nrows); >> >> I haven't tried it.So,please correct me if i am wrong >> >> >> On Mon, Jul 2, 2012 at 12:55 PM, Rishabh Agarwal <[email protected]>wrote: >> >>> >>> nrows: number of rows >>> ncols: number of columns >>> >>> int **arra = (int **)malloc( sizeof(int*) * nrows ); >>> int *ar = (int *)malloc( sizeof(int) * nrows * ncols ); >>> for( int a = 0; a < nrows; a ++ ) { >>> arra[a] = ar + ncols * a; >>> } >>> >>> now index of array i and j can be accessed as arra[i][j] >>> >>> >>> >>> On Friday, June 29, 2012 4:46:18 PM UTC+5:30, rahul r. srivastava wrote: >>>> >>>> implement a 2d matrix using only 2 mallocs. >>>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Algorithm Geeks" group. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msg/algogeeks/-/Pr2cEtta_LsJ. >>> >>> 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. >>> >> >> >> >> -- >> Abhishek Sharma >> Under-Graduate Student, >> PEC University of Technology >> >> -- >> 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. > -- Abhishek Sharma Under-Graduate Student, PEC University of Technology -- 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.
