Thread: qsort dynamic array of structs

Hi I just need help with this code when ever I try to run this code it says Segmentation fault (core dumped) . I think it could be my compare function . I want to sort to every struct in the array.



Code Removed (Ignore)

Hard to say where you messed up, when you've deleted your code.

But here's a sequence of exercises.

Code:

int array[5] = { 4, 1, 8, 3, 9 };
qsort( array, 5, sizeof(array[0]), compare_fn);

Then adjust for a structure.

Code:

struct foo {
  int a;
};
struct foo array[5] = { {4}, {1}, {8}, {3}, {9} };
qsort( array, 5, sizeof(array[0]), compare_fn);

Then adjust for a dynamic array.

Code:

struct foo {
  int a;
};
struct foo *array = malloc( 5 * sizeof(*array) );
// initialise....
qsort( array, 5, sizeof(array[0]), compare_fn);