iterate through double pointer c

The following are equivalent: Note that tracer must be a pointer to a pointer to a NODE - it must contain the memory address of a pointer to a NODE (i.e. If it's a dynamically allocated array, that is, you created it calling malloc, then as others suggest you must either save the size of the array/number of elements somewhere or have a sentinel (a struct with a special value, that will be the last one). By using our site, you Or even if he did there is no point in your comment, @JolonB Yeah that's hogwash and your teacher is incompetent. One way to correct it would be changing the declaration to. Does it point to the next address, or does it take the type of the pointer into consideration and uses the size of the variable it is pointing to to determine where the next variable starts in memory? Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? How can I search within the output buffer of a tmux shell? Before setting: 8 The most convenient is however to use a pointer to a 1D array and have it point at the first element of the 2D array: (A matter of style, but your order of ROWS and COLS is a bit weird, it is more common to do int[COLS][ROWS] then for(i=0; inext = *head correctly sets the next field of the last node (in this case, also the first node) to NULL. Is it a bug? Can I tell police to wait and call a lawyer when served with a search warrant? - AnT stands with Russia Oct 20, 2009 at 23:35 8 How to react to a students panic attack in an oral exam? How Intuit democratizes AI development across teams through reusability. How to find the distance to the nearest coastline from Property Place latitude/longitude point? What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots? []Double array through pointers in C 2010-09-17 21:02:18 2 439 c / pointers / multidimensional-array. So when we print the value of a single pointer or double pointer the value will be 20 as double-pointer is indirectly pointing to the variable n and it will access its value. You can rate examples to help us improve the quality of examples. Is it a bug? What is the point of Thrower's Bandolier? Either of the approaches can also be used when you have an array of strings (i.e. Note that a value NULL stored in the enjoy array is different than storing a pointer to an empty string. void main {int n = 20; int *pr; int **pr1; printf("\nThe address of the variable n is: %x\n", &n); pr = &n; printf("\nThe address of variable n stored in single pointer is: %x\n",