C/C++实现链表的操作，可以从文件中存取数据

链表的操作很容易理解，直接上代码

#include 
#include 
#include 
#include 

#define NULL 0

using namespace std;


struct Book {
     

  int id;
  char name[20];
  char author[20];
  char publish[20];
  float price;
  struct Book *next;
};


struct Book *filein(void)
{
      struct  Book *p1,*p2,*head;
  int i=0;
  FILE *fp;
  char file[20]="d:\\list.txt";
  if ((fp=fopen(file,"rb"))==NULL)
    {
     
      printf("不能打开文件:%s",file);
      exit(0);
    }
  head=p2=(struct Book *)malloc(sizeof(*p1));
  head->next=NULL;
  p1=(struct Book *)malloc(sizeof(*p1));
  while (fread(p1,sizeof(*p1),1,fp)==1)
   {
      i++;
     p2->next=p1;
     p2=p1;
     p1->next=NULL;
     p1=(struct Book *)malloc(sizeof(*p1));
   }
   free(p1);
  fclose(fp);
  if (i==0){
          printf(" 没有任何记录%s!");
	   }
  return(head);
};

struct Book *creat(){
     

     struct Book *head,*p,*q;
     int a=1;
     int id=1;
     q=head=(struct Book*)malloc(sizeof(struct Book));
     printf(".........................................输入图书信息...................................\n");
     while(a!=0){
     
        p=(struct Book*)malloc(sizeof(struct Book));
        printf("       输入图书名称\n");
        scanf("%s",&p->name);
        printf("       输入作者名字\n");
        scanf("%s",&p->author);
        printf("       输入出版社\n");
        scanf("%s",&p->publish);
        printf("       输入售价\n");
        scanf("%f",&p->price);
        p->id=id;
        p->next=NULL;
        q->next=p;
        q=p;
        id++;

        printf("\n");
        printf("\n");
        printf("....................是否要继续加入信息...................\n");
        printf(".........................是请按1...................\n");
        printf(".........................否请按0...................\n");
        scanf("%d",&a);
     }
     return head;

};


void print(struct Book *head){
     

    struct Book *p;
     p=head->next;
     printf("....................书单列表为...................\n");
     printf("          ID          书名          作者          出版社          售价\n");
    while(p!=NULL){
     
     printf("          %d",p->id);
     printf("         %s",p->name);
     printf("         %s",p->author);
     printf("         %s",p->publish);
     printf("         %f\n",p->price);
     p=p->next;
    }
};

void delet(struct Book *head){
     

    struct Book *p,*q;
    p=head->next;
    q=head;
     int id;
     int a=1;
     printf("....................输入你想要删除的图书的ID...................\n");
    scanf("%d",&id);
    while(a){
     
          while(p->next !=NULL && p->id!=id){
     
        q=p;
        p=p->next;
    }
    if(id==p->id){
     
        q->next=p->next;
        free(p);
    printf("！！！！！！！！！删除成功！！！！！！！！！！！！\n");
    }else{
     
    printf("！！！！！！！！没有找到这本书！！！！！！！！！！！！\n");
    }
     printf("\n");
     printf("\n");
     printf("....................是否要继续删除信息...................\n");
     printf(".........................是请按1...................\n");
     printf(".........................否请按0...................\n");
        scanf("%d",&a);
    }
};

void save(struct Book *head)
{
      struct Book *p1;
  FILE *fp;
  char file[20]="d:\\list.txt";
  if ((fp=fopen(file,"wb"))==NULL)
    {
     
      printf("不能打开文件:%s/n",file);
      exit(0);
    }
   p1=head->next;
   while (p1!=NULL)
   {
      fwrite((void *)p1,sizeof(struct Book),1,fp);
     p1=p1->next;
   }
   fclose(fp);
};



void insert(struct Book *head)
    {
     
      struct Book *p,*q;
      int a =1;
      int id=1;
      printf(".........................................输入图书信息...................................\n");
      q=head;
     while(a!=0){
     
        p=(struct Book*)malloc(sizeof(struct Book));
        printf("       输入图书名称\n");
        scanf("%s",&p->name);
        printf("       输入作者名字\n");
        scanf("%s",&p->author);
        printf("       输入出版社\n");
        scanf("%s",&p->publish);
        printf("       输入售价\n");
        scanf("%f",&p->price);
         while(q->next!=NULL){
     
              q=q->next;
              id++;
         }
         p->id=id;
         p->next=q->next;
         q->next=p;

        printf("\n");
        printf("\n");
        printf("....................是否要继续加入信息...................\n");
        printf(".........................是请按1...................\n");
        printf(".........................否请按0...................\n");
        scanf("%d",&a);
     }

    }




int main()
{
     
    int note;
    struct Book *head;
     do{
     
     printf("........................功能列表...................\n");
     printf("..............         1.创建数组  ................\n");
     printf("..............         2.删除数据  ................\n");
     printf("..............         3.打印数据  ................\n");
     printf("..............         4.保存数据  ................\n");
     printf("..............         5.提取数据  ................\n");
     printf("..............         6.添加数据  ................\n");
     printf("..............         7.退出  ................\n");
     scanf("%d",&note);
        switch(note){
     
            case 1: head=creat();
            break;
            case 2: delet(head);
            break;
            case 3: print(head);
            break;
            case 4: save(head);
            break;
            case 5: head=filein();
            break;
            case 6: insert(head);
            break;
            case 7:
            exit(0);
        }
        printf("%d",note);
    }while(note<7);

    return 0;
}

有不对的欢迎指出，代码有注释，讲述得不清楚得地方欢迎指出