Can anyone explain this code snippet?

Question

#include <stdio.h>
int main() {
struct sl{
char *z;
int i;
struct sl *p;
};
static struct sl a[] = {
{"Nagpur",1,a+1},
{"Raipur",2,a+2},
{"Kanupr",3,a}
};
struct sl *ptr = a;
printf("\n%s", ++(ptr->z));
printf("\n%s", a[(++ptr)->i].z);
printf("\n%s", a[--(ptr->p->i)].z);
return 0;
}

Answer 1

Thanks ~ swim ~