请高手帮我调试一下以下程序，为什么总是出现编译错误
#include "stdio.h"
#include "malloc.h"
#include "conio.h"
typedef struct node
  { int No;
      struct node* next;
  } node,*Link;
  /******************** /
  /*建立单循环连表   * /
  /*******************/
  
  Link CreatRing(int n)
  { int i;
      Link head=NULL,tail=NULL;
      for(i=1;i<=n;i++)
        {if (i==1) head=tail=(Link)malloc(sizeof(node));
         else
          {   tail.next=(Link)malloc(sizeof(node));
              tail=tail.next;
          }
          tail.NO=i;
          tail.next=null;
        }
      tail.next=head;
      return(head);  
  }
  /*删除结点*/
  Link Delete(Link s)
  {
      link p=s;
      while(p.next!=s)
      p=p.next;
      p.next=s.next;
      free(s);
      return(p.next);
  }
 void josephu(Link p, int n ,int ,int k)
  { int i,j;
       printf("出列的序号为:  \n");
       for(i=1;i<k;i++)
         p=p.next;
        for(i=0;i<n,i++)
        { for(j=1;j<m;j++)
            p=p.next;
            printf("%d,",p.No);
            p=Delete(p);
        }
        printf("\n");
  }
  void main()
  { int n,m,k;
      Link head=NULL;
      printf("\n 输入总人数n:");
      scanf("%d",&n);
      printf("\n 输入起始序号K:");
      scanf("%d",&k);
      printf("\n 输入M:");
      scanf("%d",&m);
      head=CreatRing(n);
      Josephu(head,n,m,k);
      getch();
      }