struct adlist*sort(struct adlist*head)//排序
{  //struct adlist*head;
   struct adlist*q,*p,*temp,*p1,*p2;
   struct adlist*head1;
   int n=0;

    head1=NULL;
    p1=p2=(struct adlist*) malloc(LEN);
   for(q=head->next;q->next!=NULL;q=q->next)
     {  temp=q;
     for(p=q;p->next!=NULL;p=p->next)
      { if(strcmp(temp->QQ,p->QQ)>0)
         {  temp=p;}   
         
      }                                    
           p1=temp;
            n=n+1;
            if(n==1)    head1=p1;
            else  p2->next=p1;
            p2=p1;
            p1=(struct adlist*)malloc(LEN);                                                                                             
      }
    p2->next=NULL;
   
  return(head1);  
   
    }  

struct adlist{
   char name[50];//名字
   char home[100];//家庭住址
   char workd[100];//工作地点
   char academy[50];//学院
   char profession[50];//专业
   char tele[20];//电话
   char phone[20];//座机
   char QQ[20];
   char Email[50];
   char job[50];
   struct adlist*next;        
   }adl;

p1=temp;怎么能这么拷贝一个结构体呢

memcpy(p1,temp,sizeof(struct adlist));