约瑟夫环

来源：互联网发布：郑州百知编辑：程序博客网时间：2024/04/25 02:32

#include "stdio.h"
#include "stdlib.h"
#include "malloc.h"

struct person
{
    short num;
    short password;
    struct person *next;
};

struct person *create_list(int N);
void output(struct person *head);

void main()
{
struct node *head,*p,*q;
int c=0,k,N,high;
printf("How many people to play the game/n");
scanf("%d",&N);
head=create_list(N);
output(head);

p=head;
c=1;
printf("/n Please input a heigh number(必须大于1,否则会出错): ");
scanf("%d",&high);
printf("/n The output sequence:/n");
k=N;
while(k>0)/*出列一人,K减1, 直到所有人全都出来*/
{
  if(c==high-1)
  {
   q=p->next;
   p->next=q->next;

   printf(" the %d man is out /n",q->num);
   high=q->password;/*将q (出列的人) 的密码作为新的high(上限值)*/
   free(q);/*释放内存*/
   c=0;
   k--;
  }
  else
  {
   c++;
   p=p->next;
  }
}
    return;
}

struct person *create_list(int N)
{
struct person *head,*p,*temp;
int i,password;
head=(struct person *) malloc(sizeof(struct person));/*申请新节点并分配内存空间*/
if(!head)
{
  printf("/nMemory allocation error!/n");
  exit(1);
}
printf("/nPlease input the First man's password (sure be >=1):");
scanf("%d",&password);
head->password=password;
head->num=1;
head->next=head;

for(i=2;i<=N;i++)
{
  p=(struct person *) malloc(sizeof(struct person));/*申请新节点并分配内存空间*/
  printf("/nPlease input the %d man's password (sure be >=1):",N-i+2);/*使用头插法添加人员, 第二个插入的人排在最后*/
  scanf("%d",&password);
  p->password=password;
  p->num=N-i+2;/*头插法*/
  p->next=head->next;
  head->next=p;
}
return head;
}

/*********************************************************/
void output(struct person *head)
{
  struct person *p;
  p=head;
  do
  {
   printf("/nthe %d man's password is:%d",p->num,p->password);
   p=p->next;
  }while(p!=head);
}