大家帮我看看啊.我这个只是按照谭浩强的<C程序设计>第二版后面(我们的教材呀)的链表练习的原代码写的一个小程序(书上的原代码啊),想漫漫的练习一下啊.可是,我写了之后却不能运行.
希望大家给我看看是哪里的问题啊....程序如下:
#include<malloc.h>
#define NULL 0
#define LEN sizeof(struct student)
struct student
{long num;
 float score;
 struct student * next;
};
int n;
struct student * creat(void)/*定义函数增加,返回一个带指向链表头的指针*/
{struct student * head,* p1,*p2;
 n=0;
 p1=p2=(struct student *)malloc(LEN);/*开辟一个新单元*/
 scanf("%ld,%f",&p1->num,&p1->score);
 head=NULL;
 while(p1->num!=0)
 {n=n+1;
  if(n==1)head=p1;
  else p2->next=p1;
  p2=p1;
  p1=(struct student * )malloc(LEN);
  scanf("%ld,%f",&p1->num,&p1->score);
 }
 p2->next=NULL;
 return(head);
}
void print(struct student * head)/*此函数的功能是输出链表*/
{struct student * p;
 printf("\nNow,These %d records are:\n",n);
 p=head;
 if(head!=NULL)
 do
   {printf("%ld,%5.1f\n",p->num,p->score);
    p=p->next;
   }while(p!=NULL);
   
}
struct student * del(struct student * head,long num)/*此函数是删除一个接点*/
{struct student * p1,* p2;
 if(head==NULL){printf("\nList null!!\n"); }/*这个end到底是怎么回师?*/
 p1=head;
 while(num!=p1->num && p1->next!=NULL)
  {p2=p1;p1=p1->next;
  }/*p1向后移动一个接点*/
 if(num==p1->num)/*找到了*/
   {if(p1==head) head=p1->next;/*p1指向的是第一个接点,把第二个接点地址赋给head*/
    else p2->next=p1->next;/*否则把下一个地址赋给前一个地址*/
    printf("delete:%ld\n",num);
    n=n-1;
   }
 else printf("%ld not been found!!\n",num);/*输出找不到该接点*/
 return(head);
}
struct student * insert(struct student * head,struct student * stud)/*此函数的作用是插入一个结点*/
{struct student * p0,* p1,* p2;
 p1=head;                  /*使p1指向第一个接点*/
 p0=stud;                  /*p0指向要插入的接点*/
 if(head==NULL)
   {head=p0;p0->next=NULL;}/*使p0指向的接点作为头接点*/
 else
   {while((p0->num>p1->num)&&(p1->next!=NULL))
       {p2=p1;              /*使p2指向刚才p1指向的结点*/
        p1=p1->next;
       } /*p1后移一个结点*/
     if(p0->num<p1->num)
       {if(head==p1) head=p0;/*插入到原来的第一个结点之前*/
        else p2->next=p0;    /*插入到p2指向的结点之后*/
        p0->next=p1;
       }
     else{p1->next=p0;p0->next=NULL;}/*插入到最后的结点之后*/
   }
 n=n+1;
 return(head);
}
main()
{struct student * head,* stu;
 long del_num;
 printf("input records: \n");
 head=creat();/*调用creat函数*/
 print(head);/*调用print函数*/
 printf("\ninput the deleted number:");
 scanf("%ld",&del_num);
 while(del_num!=0)
    {head=del(head,del_num);
     print(head);
     printf("input the deleted number:");
     scanf("%ld",&del_num);    
    }
 printf("\ninput the inserted record:");
 stu=(struct student *)malloc(LEN);
 scanf("%ld,%f",&stu->num,&stu->score);
 while(stu->num!=0)
    {head=insert(head,stu);
     print(head);
     printf("input the inserted record:");
     stu=(struct student * )malloc(LEN);
     scanf("%ld,%f",&stu->num,&stu->score);
    }
}
编译是通过了.可是当我输入第一个数据的时候:99101,99     按回车之后就出错了,显示:scanf : floating point formats not linked
Abnormal program termination
请问各位大哥哥,这是什么错误啊???我应该怎么做啊??这个我不是要做作业拉。。。你们要回答我哦。。。
  

