#include<stdio.h>
#include<malloc.h>
#include<math.h>
/*定义两个结构体*/
struct vex{ double x,y,z; struct vex *next;struct vex *last;};
struct vexlist
{
  struct vex *mainvex;
  struct vex *re_vex[6];
  struct vexlist *next;
};
/*创建点的链表，由文件中输入*/
struct vex *creatvex(void)                    
{
    struct vex *p1,*p2,*head;
    double x,y,z;
    freopen("C:\\data.txt","r",stdin);
    head=0;
    while(scanf("%f%f%f",&x,&y,&z)!=EOF)
    {
        p1=(struct vex*)malloc(sizeof(struct vex));
        p1->x=x,p1->y=y,p1->z=z,p1->next=0;p1->last=0;
        if(!head)
        {
            head=p1;
            p2=p1;
        }
        else
        {
            p2->next=p1;
            p1->last=p2;
            p2=p1;
        }
    }
    return (head);
}

/*创建点列的链表，由点链表中操作得*/
struct vexlist *creatlist(void)
{
struct vexlist *head,*p1,*p2;
int n;
void in(struct vexlist *);
n=0;
head=0;
p1=p2=(struct vexlist *)malloc(sizeof(struct vexlist));
in(p1);
  while(p1->next!=0)
  {n=n+1;
   if(n==1)head=p1;
    else
     p2->next=p1;
  p2=p1;  
  p1=(struct vexlist *)malloc(sizeof(struct vexlist));
  in(p1);
  }
return head;
}

/*定义IN函数*/
void in (struct vexlist *vlist)
{
    double dis(struct vex *,struct vex *);
    static struct vex *p0,*temp,*head;
    struct vex *p1,*p2;
    int i=0;
    head=creatvex();
    p0=head;
    temp=head;
      if(temp->last==0)
        temp=p0->next;
        else
        {temp=head;
        p0->last->next=p0->next;
        p0->next->last=p0->last;
        }
   do
   {p1=temp;
   p2=p1->next;
   if(dis(p0,p1)<dis(p0,p2))
     {
         vlist->re_vex[i]=p1;
         p1=p2;
         p2=p2->next;
     }
     else
     {
         vlist->re_vex[i]=p2;
         p2=p2->next;
     }
   i++;
   }while(p2->next==0);
   vlist->mainvex=p0;
   if(p0->last!=0)
   {
       p0->last->next=p0;
       p0->next->last=p0;
   }
   p0=p0->next;
}

/*定义距离函数dis*/
double dis(struct vex *N,struct vex *M)
{
    double t;
    t=sqrt((N->x-M->x)*(N->x-M->x)+(N->y-M->y)*(N->y-M->y)+(N->z-M->z)*(N->z-M->z));
    return t;
}


/*检测*/
void print(struct vexlist *head)
{
      struct vexlist *p;
      p=head;
        if(head!=0)
                do
                {
                  printf("%f,%f,%f;\n",&p->mainvex->x,&p->mainvex->y,&p->mainvex->z);     
                  p=p->next;
                }while(p!=0);
}
void main()
{  
   void print(struct vexlist *head);
   struct vex *creatvex(void);
   struct vexlist *creatlist(void);
   struct vexlist *p;
   p=creatlist();
   print(p);
}

本意是在一个立方体中确立一个点然后输出除体对角线外的其余六点 可是编译没问题输出却只有三个点且输出的都是零 为啥呢哪里出错了？