#include<stdio.h>
struct student
{
   long num;
   char *name;
   char *sex;
   int age;
   struct student *nxet;
};
struct student *creat(void)
{
   struct student *head,*p1,*p2;
   printf("qing shu ru:\n");
   p2=p1=(struct student *)malloc(sizeof(struct student));
   scanf("%ld,%s,%s,%d",&p1->num,p1->name,p1->sex,&p1->age);
   head=NULL;
   while(p1->num!=0)
   {
      if(head==NULL)head=p1;
      else p2->nxet=p1;
      p2=p1;
      p1=(struct student *)malloc(sizeof(struct student));
      scanf("%ld,%s,%s,%d",&p1->num,p1->name,p1->sex,&p1->age);
   }
   p2->nxet=NULL;
   free(p1);
   return(head);
}
struct student *cut_del(struct student *head,long num)
{
   struct student *a,*b;
   a=head;
   while(a->num!=num)
   {
       b=a;
       a=a->nxet;
   }
   if(a==head)a=head->nxet;
   else b->nxet=a->nxet;
   return(a);

}
void print(struct student *a)
{
   struct student *p;
   p=a;
   while(p!=NULL)
   {
       printf("\n%ld;%s;%s;%d\n",p->num,p->name,p->sex,p->age);
       p=p->nxet;
   }
}
void main()
{
  struct student *a;
  long aa;
  a=creat();
  printf("\nqing shu ru num:");
  scanf("%ld",&aa);
  a=cut_del(a,aa);
  print(a);
  getch();
}