程序代码：

#include<stdio.h>
#include<string.h>
#include<malloc.h>
struct book
{
    int num;
    char name[30];
    char author[30];
    int classnum;
    char pub[30];
    long int time;
    float price;
    struct book *next;
};
void main()
{   
    struct book *last,*head,*s;

    int x=1;
    float y;
    head=NULL;
    last=NULL;
   
    while(x==1)
    {
        struct book *s;
        s=(struct book*)malloc(sizeof(struct book));
        printf("请输入书号");
        scanf("%d",&s->num);
        printf("输入书名");
        gets(s->name);
        printf("输入作者");
        gets(s->author);
        printf("输入分类号");
        scanf("%d",&s->classnum);
        printf("输入出版社");
        gets(s->pub);
        printf("输入出版时间");
        scanf("%d",&s->time);
        printf("输入价格");
        scanf("%f",&y);
        s->price=y;
        s->next=NULL;
        last->next=s;
        last=s;
        printf("是否继续\n1·是\n2·否\n");
        scanf("%d",&x);

    }   
}