c++实现控制台图书管理系统

好的，下面是一个简单的控制台图书管理系统的C++实现：

#include<iostream>
#include<fstream>
#include<cstring>
#include<cstdlib>
#include<cstdio>
#include<iomanip>
using namespace std;

const int maxn = 1000;

struct book{
    char id[10];
    char name[20];
    char author[20];
    char publisher[30];
    char date[20];
    int quantity;
    double price;
}books[maxn];

int n = 0;

void menu();
void show();
void add();
void search();
void remove();
void modify();
void sort();
void save();
void load();

int main(){
    load(); // 加载文件中的数据
    menu();
    save(); // 保存数据到文件中
    return 0;
}

void menu(){
    while(1){
        system("cls");
        cout << "=======================================" << endl;
        cout << "           图书管理系统 v1.0" << endl;
        cout << "=======================================" << endl;
        cout << "             1. 显示图书" << endl;
        cout << "             2. 添加图书" << endl;
        cout << "             3. 查找图书" << endl;
        cout << "             4. 删除图书" << endl;
        cout << "             5. 修改图书" << endl;
        cout << "             6. 排序图书" << endl;
        cout << "             0. 退出系统" << endl;
        cout << "=======================================" << endl;
        cout << "请选择操作：";
        int choice;
        cin >> choice;
        switch(choice){
            case 0:
                return;
            case 1:
                show();
                break;
            case 2:
                add();
                break;
            case 3:
                search();
                break;
            case 4:
                remove();
                break;
            case 5:
                modify();
                break;
            case 6:
                sort();
                break;
            default:
                cout << "输入有误，请重新输入！" << endl;
                system("pause");
        }
    }
}

void show(){
    if(n == 0){
        cout << "没有图书记录！" << endl;
        system("pause");
        return;
    }
    cout << setw(10) << "编号" << setw(20) << "书名" << setw(20) << "作者" << setw(30) << "出版社" << setw(20) << "出版日期" << setw(10) << "数量" << setw(10) << "价格" << endl;
    for(int i = 0; i < n; i++){
        cout << setw(10) << books[i].id << setw(20) << books[i].name << setw(20) << books[i].author << setw(30) << books[i].publisher << setw(20) << books[i].date << setw(10) << books[i].quantity << setw(10) << books[i].price << endl;
    }
    system("pause");
}

void add(){
    cout << "请输入图书编号：";
    cin >> books[n].id;
    cout << "请输入图书名称：";
    cin >> books[n].name;
    cout << "请输入图书作者：";
    cin >> books[n].author;
    cout << "请输入图书出版社：";
    cin >> books[n].publisher;
    cout << "请输入图书出版日期：";
    cin >> books[n].date;
    cout << "请输入图书数量：";
    cin >> books[n].quantity;
    cout << "请输入图书价格：";
    cin >> books[n].price;
    n++;
    cout << "添加成功！" << endl;
    system("pause");
}

void search(){
    cout << "请输入要查找的图书名称：";
    char name[20];
    cin >> name;
    for(int i = 0; i < n; i++){
        if(strcmp(books[i].name, name) == 0){
            cout << setw(10) << "编号" << setw(20) << "书名" << setw(20) << "作者" << setw(30) << "出版社" << setw(20) << "出版日期" << setw(10) << "数量" << setw(10) << "价格" << endl;
            cout << setw(10) << books[i].id << setw(20) << books[i].name << setw(20) << books[i].author << setw(30) << books[i].publisher << setw(20) << books[i].date << setw(10) << books[i].quantity << setw(10) << books[i].price << endl;
            system("pause");
            return;
        }
    }
    cout << "没有找到该图书！" << endl;
    system("pause");
}

void remove(){
    cout << "请输入要删除的图书名称：";
    char name[20];
    cin >> name;
    for(int i = 0; i < n; i++){
        if(strcmp(books[i].name, name) == 0){
            for(int j = i; j < n - 1; j++){
                books[j] = books[j + 1];
            }
            n--;
            cout << "删除成功！" << endl;
            system("pause");
            return;
        }
    }
    cout << "没有找到该图书！" << endl;
    system("pause");
}

void modify(){
    cout << "请输入要修改的图书名称：";
    char name[20];
    cin >> name;
    for(int i = 0; i < n; i++){
        if(strcmp(books[i].name, name) == 0){
            cout << "请输入图书编号：";
            cin >> books[i].id;
            cout << "请输入图书名称：";
            cin >> books[i].name;
            cout << "请输入图书作者：";
            cin >> books[i].author;
            cout << "请输入图书出版社：";
            cin >> books[i].publisher;
            cout << "请输入图书出版日期：";
            cin >> books[i].date;
            cout << "请输入图书数量：";
            cin >> books[i].quantity;
            cout << "请输入图书价格：";
            cin >> books[i].price;
            cout << "修改成功！" << endl;
            system("pause");
            return;
        }
    }
    cout << "没有找到该图书！" << endl;
    system("pause");
}

void sort(){
    cout << "请选择排序方式：" << endl;
    cout << "1.按编号排序" << endl;
    cout << "2.按书名排序" << endl;
    cout << "3.按作者排序" << endl;
    cout << "4.按出版社排序" << endl;
    cout << "5.按出版日期排序" << endl;
    int choice;
    cin >> choice;
    switch(choice){
        case 1:
            for(int i = 0; i < n - 1; i++){
                for(int j = 0; j < n - i - 1; j++){
                    if(strcmp(books[j].id, books[j + 1].id) > 0){
                        book tmp = books[j];
                        books[j] = books[j + 1];
                        books[j + 1] = tmp;
                    }
                }
            }
            cout << "按编号排序成功！" << endl;
            system("pause");
            break;
        case 2:
            for(int i = 0; i < n - 1; i++){
                for(int j = 0; j < n - i - 1; j++){
                    if(strcmp(books[j].name, books[j + 1].name) > 0){
                        book tmp = books[j];
                        books[j] = books[j + 1];
                        books[j + 1] = tmp;
                    }
                }
            }
            cout << "按书名排序成功！" << endl;
            system("pause");
            break;
        case 3:
            for(int i = 0; i < n - 1; i++){
                for(int j = 0; j < n - i - 1; j++){
                    if(strcmp(books[j].author, books[j + 1].author) > 0){
                        book tmp = books[j];
                        books[j] = books[j + 1];
                        books[j + 1] = tmp;
                    }
                }
            }
            cout << "按作者排序成功！" << endl;
            system("pause");
            break;
        case 4:
            for(int i = 0; i < n - 1; i++){
                for(int j = 0; j < n - i - 1; j++){
                    if(strcmp(books[j].publisher, books[j + 1].publisher) > 0){
                        book tmp = books[j];
                        books[j] = books[j + 1];
                        books[j + 1] = tmp;
                    }
                }
            }
            cout << "按出版社排序成功！" << endl;
            system("pause");
            break;
        case 5:
            for(int i = 0; i < n - 1; i++){
                for(int j = 0; j < n - i - 1; j++){
                    if(strcmp(books[j].date, books[j + 1].date) > 0){
                        book tmp = books[j];
                        books[j] = books[j + 1];
                        books[j + 1] = tmp;
                    }
                }
            }
            cout << "按出版日期排序成功！" << endl;
            system("pause");
            break;
        default:
            cout << "输入有误，请重新输入！" << endl;
            system("pause");
    }
}

void save(){
    ofstream fout("books.txt");
    for(int i = 0; i < n; i++){
        fout << books[i].id << " " << books[i].name << " " << books[i].author << " " << books[i].publisher << " " << books[i].date << " " << books[i].quantity << " " << books[i].price << endl;
    }
    fout.close();
}

void load(){
    ifstream fin("books.txt");
    while(fin >> books[n].id >> books[n].name >> books[n].author >> books[n].publisher >> books[n].date >> books[n].quantity >> books[n].price){
        n++;
    }
    fin.close();
}

该程序使用结构体 `book` 存储图书信息，包括编号、名称、作者、出版社、出版日期、数量和价格。程序提供了以下功能：

1. 显示图书
2. 添加图书
3. 查找图书
4. 删除图书
5. 修改图书
6. 排序图书

图书信息保存在文件 `books.txt` 中，程序启动时会从文件中读取数据。程序结束时，会将数据保存到文件中。