约瑟夫环

#include <iostream>
#include <stdlib.h>
#include <stdio.h>


#define ERROR 0


typedef struct LNode
{
int data;
struct LNode *link;
}LNode, *LinkList;


void JOSEPHUS(int n, int k, int m)
{
/*p为当前节点，r为辅助节点，
指向p的前驱节点，list为头节点*/
LinkList p, r, list, curr;


/*建立循环链表*/
p = (LinkList)malloc(sizeof(LNode));
p->data = 0;
p->link = p;
curr = p;
for(int i = 1; i < n; i++)
{
LinkList t = (LinkList)malloc(sizeof(LNode));
t->data = i;
t->link = curr->link;
curr->link = t;
curr = t;
}


r = curr;
while(k--) r = p, p = p->link;
while(n--)
{
for(int s = m - 1;s--;r = p, p = p->link);
r->link = p->link;
printf("%d->", p->data);
free(p);
p = r->link;
}
}


void main()
{
JOSEPHUS(9, 1, 5);

}

有错误，会输出0，神马情况啊？请大神指教！