简单图书管理系统

// Library_botao.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#define ElemType Book   //宏定义
#define LIST_INT_SIZE 1 //改为1，改用ListInsert增加空间
#include 
#include 
#include 
#include "malloc.h"
#include 
using namespace std;
void bookFirst();  //先初始化书籍
void bookOut();    //输出
//定义一个结构体，表示书籍的信息
struct Book
    {
    int bookId;
    char bookName[20];
    char bookAuthor[20]; //作者
    int bookCount;
    //char bookLender[20];  //借阅者
    };
//每次初始化书籍时，给定一本书固定的bookId号，不会改变  //同一种书用同一个书号
/************************************************************************/
/* 定义线性表，用于对图书号建索引，加快查询速度                                                                     */
/************************************************************************/
//定义一个顺序表
struct Sqlist{           
    ElemType *elem;
    int length;
    int listsize;
    }L={NULL,0,0};
//定义一个枚举类型，让所有的函数返回一个枚举类型的结果
enum status
    {
    OK,FAILED,EMPTY,NOTINIT,OVERFLOW1,NULLHEAD//OVERFLOW在visual studio无法使用，改为OVERFLOW1
    };
void bookFirst()
    {
          
        ofstream of("book.dat",ios::out|ios::binary);  //定义文件输出流，文件不存在时创建文件
        if (!of)
            {
            cout<<"The file open error!"<>book->bookId;
                cout<<"bookName:";
                cin>>book->bookName;
                cout<<"bookAuthor:";
                cin>>book->bookAuthor;
                cout<<"bookCount:";
                cin>>book->bookCount;
                of.write((char*)book,sizeof(Book));
            }
        of.close();
        ofstream of1("book.dat",ios::app|ios::binary);
        Book *book1=new Book;
        cout<<"bookId:";
        cin>>book1->bookId;
        cout<<"bookName:";
        cin>>book1->bookName;
        cout<<"bookAuthor:";
        cin>>book1->bookAuthor;
        cout<<"bookCount:";
        cin>>book1->bookCount;
        of1.write((char*)book1,sizeof(Book));
        of1.close();
    }
void bookOut()
    {
        ifstream inFile("book.dat",ios::in|ios::binary);
        if (! inFile)
        {
            cout<<"The file open error"<bookId;
            cout<<" "<<"bookNname:"<bookName;
            cout<<" "<<"bookAuthor:"<bookAuthor;
            cout<<" "<<"bookCunt:"<bookCount;
            cout<next=NULL;
        strcpy((head->book).bookName,"");   //初始化头结点
        (head->book).bookCount=0;
        (head->book).bookId=0;
    //  cout<<"LinkList已初始化......."<next!=NULL)    //让指针指到最后
             q=q->next;
         //ElemType e;   //从文件中读取     for循环
         ifstream inFile("book.dat",ios::in|ios::binary);
         if (!inFile)
         {
            cout<<"Open File error!"<next=(Lnode *)malloc(sizeof(Lnode));
                        strcpy(q->next->book.bookName,b->bookName);
                        strcpy(q->next->book.bookAuthor,b->bookAuthor);
                        q->next->book.bookId=b->bookId;
                        q->next->book.bookCount=b->bookCount;
                        b=new Book;
                        q=q->next;
                        q->next=NULL;
                    }
                inFile.close();
             }
         return OK;
    }
status search(LinkList head,ElemType e)     //查询书籍
    {
         LinkList q;
         q=head;
         int n=0;
         while(NULL!=q->next)
             {
                if (strcmp(q->next->book.bookName,e.bookName)==0)
                {
                    n++;
                    cout<<"您要查询的书籍为:"<next->book.bookId<<" "<next->book.bookId<<" "<next->book.bookAuthor<<" "<next->book.bookCount<next;
             }
         if (n==0)
         {
            cout<<"不好意思，本馆暂时没有你们要借的书。。。。。。。。。。。。"<next!=NULL)
            {
                if (strcmp(q->next->book.bookName,e.bookName)==0)
                {
                    n++;
                    q->next->book.bookCount++;
                }
                q=q->next;
            }
        if (n==0)                      //说明以前图书馆不存在该书
        {
            q->next=(Lnode *)malloc(sizeof(Lnode));     
            q->next->book=e;
            q->next->book.bookCount=1;  //图书馆有了这样的书 1本
        }
        q->next->next=NULL;
        return OK;
    }
//借书
status LinkList_Lend(LinkList head, ElemType e)
    {
        //遍历链表看要借的书是否在管中，若在，返回书籍，不在返回信息
        LinkList q;
        q=head;
        int n=0;
        while(q->next!=NULL)
            {
                if (strcmp(q->next->book.bookName,e.bookName)==0)
                {
                    n++;
                    if (q->next->book.bookCount>0)    //图书馆中还有该书，返回该书信息，修改书籍信息
                    {
                        q->next->book.bookCount--;
                        cout<<"您要借的书："<next->book.bookId<<" "<next->book.bookName<<" "<next->book.bookAuthor<next;
            }
        if (n==0)
        {
            cout<<"不好意思，您要的书本馆暂时没有。。。。"<next)
            {
                  if (strcmp(q->next->book.bookName,e.bookName)==0)
                  {
                        n++;
                        q->next->book.bookCount++;
                  }
                  q=q->next;
            }
        if (n==0)
        {
        cout<<"对不起，您借的书不是本馆的书........"<next)
        {
            cout<<"单链表中没有元素！"<next;
        int i=0;
        while(NULL!=p)
            {          
                cout<book.bookId<<" "<book.bookName<<" "<book.bookAuthor<<" "<book.bookCount<next;
            }
    }
status AddFile(LinkList head)       //将修改后的图书馆信息重新写回文件
    {
        ofstream outf("book.dat",ios::out|ios::binary);  //打开文件输出流
        LinkList p;
        p=head;
        if (!outf)
        {
            cout<<"Open Flie error......"<next)
                    {
                         (*b)=p->next->book;   //将链表中的Book信息赋给（*b）
                         outf.write((char *)b,sizeof(Book));
                           
                         b=new Book;
                         p=p->next;
                    }
                outf.close();
            }
        return OK;
    }
status select_L(LinkList head)         //系统选择函数
    {
    //InitList_sq(L,5);      //线性表完成加载
    //ListInput_Sq(L);
      
    cout<<"                             Welcome to Library"<>n;
    cout<>book.bookName;
        search(head ,book);
        select_L(head);
        break;
    case 3:
        //借书  。。。。。。。。。
        cout<<"请输入您要借的书的名字:"<>book.bookName;
        LinkList_Lend(head,book);
        AddFile(head);  //将借书后的书籍信息重新再写到文件中
         select_L(head);
        break;
    case 4:
        //还书 。。。。。。。。。。。
        cout<<"请输入您想还的书的名字:"<>book.bookName;
        LinkList_Return(head,book);
        AddFile(head);
        select_L(head);
        break;
    case 5:
        //新书采编入库...............
        cout<<"输入新书的名字和书号:"<>book.bookId;
        cout<<"bookName:"<>book.bookName;
        cout<<"bookAuthor:"<>book.bookAuthor;
        LinkList_Add(head,book);
        AddFile(head);
        select_L(head);
        break;
    case 6:
        exit(0);
        break;
    default:
        break;
        }
    return OK;
    }
int main()
    {
          
    //      bookFirst();
    //      bookOut();
        LinkList head=LinkListInit();   //初始化一个带头结点的链表
        ElemType e;
        strcpy(e.bookName,"J+++");
        strcpy(e.bookAuthor,"boo");
        e.bookId=1001;
        e.bookCount=1;
        LinkList_Creat(head,e);
        cout<<"图书馆信息已加载........."<            
            
                            

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