图书管理系统(最终版C++文件操作)

图书的采编入库功能——输入图书基本信息并保存到文件中;

图书的显示库存功能——显示出库存图书的基本信息;

图书的查询功能——根据书名查询图书信息,并显示查询结果;

图书的借阅功能——输入借阅基本信息,改变图书现存量;

图书的归还功能——注销对借阅者的登记,改变该书的现存量;

图书的删除功能——根据书号删除图书信息;

图书的借阅记录功能——显示所有借阅记录的基本信息;

 

#include<iostream>
using namespace std;
#include<fstream>
#define filename "book2.txt"
#define file "stu2.txt"
#include<list>
#include<cstring>
#include<iomanip>

class Book    //创建Book类,存放图书信息
{
public:
    Book(string na=" " ,int p=0, int n=0, int bid =0  )
    {   bookid =bid;
        name = na;
        num = n;
        price = p;
    }
    void Show()
    {
        cout <<  "\t书号:" << std::left << setw(20) << bookid << "书名:" << std::left << setw(20) << name << std::right << setw(6) << "\t价格:" << price << "\t数量:" << num << endl;
    }
    void Set()
    {
        cout <<"请再次输入书号:";
        cin >> bookid;
        cout << "请输入书名:";
        cin >> name;
        cout << "请输入价格:";
        cin >> price;
        cout << "请输入数量:";
        cin >> num;

    }

    void Sets()
    {
         cout <<"请输入书号:";
        cin >> bookid;
    }

    void Addnum()
    {
        int n;
        cout << "请输入归还的数量:"<<endl;
        cin >> n;
        num += n;
    }
    void Borrownum()
    {
        int n;
        cout << "请输入借出的数量:"<<endl;
        cin >> n;
        while(num-n<0){
            cout <<"抱歉,本书库存不足,请修改借阅数量"<<endl;
            cout << "请重新输入借出的数量:"<<endl;
            cin >> n;
        }
          num -= n;

        }






public:

    string name;
    int price;
    int num;
    int bookid;

};


class Stu    
{
public:
    Stu(int bid =0 , string sid =" ", int da=0)
    {   bookid =bid;
        stuid =sid;
        date =da;
    }
    void Show()
    {
        cout <<  "\t书号:" << std::left << setw(20) << bookid << "借阅者证件号:" << std::left << setw(20) << stuid << std::right << setw(6) << "\t归还期限:" << date << endl;
    }
    void Set()
    {
        cout <<"请输入书号:";
        cin >> bookid;
        cout << "请输入借阅者证件号:";
        cin >> stuid;
        cout << "请输入归还期限:";
        cin >> date;

    }

public:

    string stuid;
    int date;
    int bookid;

};




void menu()
{
    cout << endl;
    cout << endl;
    cout << "            ******************************************************************" << endl;
    cout << "            *********************欢迎光临图书管理系统*************************" << endl;
    cout << "            ****************        请选择以下功能         *******************" << endl;
    cout << "            ****************         0 - 退出系统          *******************" << endl;
    cout << "            ****************         1 - 显示库存          *******************" << endl;
    cout << "            ****************         2 - 查询图书          *******************" << endl;
    cout << "            ****************         3 - 借阅图书          *******************" << endl;
    cout << "            ****************         4 - 归还图书          *******************" << endl;
    cout << "            ****************         5 - 采编入库          *******************" << endl;
    cout << "            ****************         6 - 删除图书          *******************" << endl;
    cout << "            ****************         7 - 借阅记录          *******************" << endl;
    cout << "            ******************************************************************" << endl;
    cout << endl;
    cout << endl;
}


class Booklist    //创建BookList类,数据成员有Book还有图书数量
{
public:
    void save()    //新建图书的话保存数据,用app方式打开文件
    {
        ofstream fout(filename, ios::app);
        list<Book>::iterator it = BList.begin();
        for (int i = 0; i < num-1; i++)    //偏移迭代器,指向新加入的Book并写入文件
        {
            it++;
        }
        for (; it != BList.end(); it++)

        {

            fout << (*it).bookid << ' ' << (*it).name << ' ' << (*it).price << ' ' << (*it).num << '\n';
        }
        fout.close();
    }
    void resave()
    {
        ofstream fout(filename, ios::out);    //重新写入数据,因为删除了某个元素
        if (fout.is_open())
        {
            for (list<Book>::iterator it = BList.begin(); it != BList.end(); it++)
            {
                fout << (*it).bookid<< ' ' << (*it).name << ' ' << (*it).price << ' ' << (*it).num << '\n';
            }
        }
        fout.close();
    }
    void Show()
    {
        for (list<Book>::iterator it = BList.begin(); it != BList.end(); it++)
        {
            (*it).Show();
        }
    }
    void adddata()    //添加数据
    {
        Book B;
        B.Set();
        BList.push_back(B);
        num++;
    }

    int select()
    {
        Book B;
        B.Sets();
         for (list<Book>::iterator it = BList.begin(); it != BList.end(); it++)
        {
            if ((*it).bookid == B.bookid){

                cout << "本书已经在库中,请直接输入数量:";
                cin >> num;
                (*it).num+=num;
                return 1;
            }
            else{

                return 0;
            }

        }

    }

    void start()    //程序一开始读取文件里的数据
    {
        string na;
        int n;
        int p;
        ifstream fin(filename, ios::in);
        if (fin.is_open())
        {
            while (fin >> na >> p >> n)
            {
                Book B(na, p, n);
                BList.push_back(B);
                num++;
            }
        }
        fin.close();
    }
    void increase()
    {
        cout << "请输入书名:" << endl;
        string n;
        cin >> n;
        for (list<Book>::iterator it = BList.begin(); it != BList.end(); it++)
        {
            if ((*it).name == n)
                (*it).Addnum();
        }
        resave();
    }
    void decrease()
    {
        cout << "请输入书名:" << endl;
        string n;
        cin >> n;
        for (list<Book>::iterator it = BList.begin(); it != BList.end(); it++)
        {
            if ((*it).name == n)
                (*it).Borrownum();
        }
        resave();
    }
    void FindBook()
    {
        string name;
        cout << "请输入书名:";
        cin >> name;
        for (list<Book>::iterator it = BList.begin(); it != BList.end(); it++)    //遍历整个list,所以符合关键字的都会被找到
        {
            int index = (*it).name.find(name);    //如果没找到返回值是一个很大的数
            if (index < (*it).name.length())
                (*it).Show();
        }
    }
    void DeleteBook()
    {
        string name;
        cout << "请输入书名:";
        cin >> name;
        int i = 0;
        for (list<Book>::iterator it = BList.begin(); it != BList.end();it++)
        {
            if ((*it).name == name)
                break;
            ++i;
        }
        list<Book>::iterator it = BList.begin();
        advance(it, i);
        BList.erase(it);
        --num;
        resave();
    }
public:
    list<Book>BList;
    int num = 0;
};



class Stulist    //创建BookList类,数据成员有Book还有图书数量
{
public:
    void save()    //新建图书的话保存数据,用app方式打开文件
    {
        ofstream fout(file, ios::app);
        list<Stu>::iterator it = SList.begin();
        for (int i = 0; i < num-1; i++)    //偏移迭代器,指向新加入的Book并写入文件
        {
            it++;
        }
        for (; it != SList.end(); it++)
        {
            fout << (*it).bookid << ' ' << (*it).stuid << ' ' << (*it).date << '\n';
        }
        fout.close();
    }
    void resave()
    {
        ofstream fout(file, ios::out);    //重新写入数据,因为删除了某个元素
        if (fout.is_open())
        {
            for (list<Stu>::iterator it = SList.begin(); it != SList.end(); it++)
            {
                fout << (*it).bookid << ' ' << (*it).stuid << ' ' << (*it).date << '\n';
            }
        }
        fout.close();
    }
    void Show()
    {
        for (list<Stu>::iterator it = SList.begin(); it != SList.end(); it++)
        {
            (*it).Show();
        }
    }
    void adddata()    //添加数据
    {
        Stu S;
        S.Set();
        SList.push_back(S);
        num++;
    }
    void start()    //程序一开始读取文件里的数据
    {
        int bid;
        string sid;
        int da;
        ifstream fin(file, ios::in);
        if (fin.is_open())
        {
            while (fin >> bid >> sid >> da)
            {
                Stu S (bid, sid, da);
                SList.push_back(S);
                num++;
            }
        }
        fin.close();
    }

    void FindStu()
    {
        int stuid;
        cout << "请输入借阅者证件号:";
        cin >> stuid;
        for (list<Stu>::iterator it = SList.begin(); it != SList.end(); it++)    //遍历整个list,所以符合关键字的都会被找到
        {
            int index = (*it).stuid.find(stuid);    //如果没找到返回值是一个很大的数
            if (index < (*it).stuid.length())
                (*it).Show();
        }
    }

    void DeleteStu()
    {
        int bookid;
        cout << "请输入书号:";
        cin >> bookid;
        int i = 0;
        for (list<Stu>::iterator it = SList.begin(); it != SList.end();it++)
        {
            if ((*it).bookid == bookid)
                break;
            ++i;
        }
        list<Stu>::iterator it = SList.begin();
        advance(it, i);
        SList.erase(it);
        --num;
        resave();
    }

public:
    list<Stu>SList;
    int num = 0;
};

int main()
{
    Booklist B1;
    Stulist S1;
    B1.start();
    S1.start();
while (1)
    {
        menu();
        int key;
        cout << "请输入要进行的操作:";
        cin >> key;
        switch (key)
        {
        case 0:
            return 0;
            break;
        case 1:
            B1.Show();
            break;
        case 2:
            B1.FindBook();
            break;
        case 3:
            cout<<"现有库存情况为,请选择你想借阅的书籍:"<<endl;
            B1.Show();
            B1.decrease();
            S1.adddata();
            S1.save();
            break;
        case 4:
            cout<<"现有借阅情况为,请选择你想归还的书籍:"<<endl;
            S1.Show();
            B1.increase();
            S1.DeleteStu();
            break;
        case 5:
        {
            int a;
            a=B1.select();
            if(a==1){
                B1.resave();
            }
            else {
                B1.adddata();
                B1.save();
            }
            break;
        }
        case 6:
            B1.DeleteBook();
            break;
        case 7:
            S1.Show();
            break;

        }

    }
}

 

posted @ 2022-07-16 14:19  zrswheart  阅读(651)  评论(0编辑  收藏  举报