#define len sizeof(struct catmouse)
struct catmouse
{int num;
struct catmouse *next;
};
void main()
{struct catmouse *head,*p,*q;
int n,m,i,j;
int a[7];
printf("\nenter the an integer:");
scanf("%d",&n);
p=q=(struct catmouse*)malloc(len);
p->num=1;
head=p;
for(i=2;i<=n;i++) //建立循环链表
{ p=(struct catmouse*)malloc(len);
p->num=i;
q->next=p;
q=p;
}
q->next=head;
p=q=head; //指向头节点,每个一个节点依次删去吃掉的老鼠
for(i=0;i<n;i++)
{
p=q->next;
q=p;
p=q->next;
q->next=p->next;
free(p);
}
printf("\n最后一个号码是:%d",p->num); //结果
getch();
}