using qsort() to sort pointers to structs containing strings

Question

I\'m not sure if this is possible to do with qsort because what I want to sort (array of pointers to struct) is not what I am comparing (strings).

Here is an abridge

Answer 1

What will be passed to cmp() are struct student** parameters (in the guise of void*). So change cmp() like so:

int
cmp(const void *p0, const void *p1)
{
        struct student* ps0 = *(struct student**) p0;
        struct student* ps1 = *(struct student**) p1;

        return strcmp( ps0->lname, ps1->lname);
}