C Programming :: Structures, Unions, Enums - Discussion

#include<stdio.h>
struct aaa{
struct aaa *prev;
int i;
struct aaa *next;
};
void main()
{
struct aaa abc,def,ghi,jkl;
int x=100;
abc.i=0;
abc.prev=&jkl;
abc.next=&def;
def.i=1;def.prev=&abc;
def.next=&ghi;
ghi.i=2;ghi.prev=&def;
ghi.next=&jkl; jkl.i=3;
jkl.prev=&ghi;
jkl.next=&abc;
x=abc.next->next->prev->next->i;
printf("%d",x);
}