用c++写一个超市管理系统

好的，下面是一个简单的超市管理系统的 C++ 代码示例，包含了商品信息的录入、查询、修改、删除以及购物结算等功能。注意：本代码仅供参考，实际应用中需要根据具体需求进行适当的修改和完善。

#include <iostream>
#include <string>
#include <vector>
#include <iomanip> // 控制输出格式

using namespace std;

// 商品结构体
struct Commodity {
    string name;        // 商品名称
    double price;       // 商品价格
    int stock;          // 商品库存
};

// 超市类
class Supermarket {
public:
    // 构造函数
    Supermarket() {
        // 初始化商品列表
        Commodity c1 = {"iPhone X", 9999.0, 10};
        Commodity c2 = {"华为P30", 5299.0, 20};
        Commodity c3 = {"小米9", 2999.0, 30};
        Commodity c4 = {"OPPO R17", 3199.0, 15};
        m_commodities.push_back(c1);
        m_commodities.push_back(c2);
        m_commodities.push_back(c3);
        m_commodities.push_back(c4);
    }

    // 添加商品
    void addCommodity() {
        Commodity c;
        cout << "请输入商品名称：";
        cin >> c.name;
        cout << "请输入商品价格：";
        cin >> c.price;
        cout << "请输入商品库存：";
        cin >> c.stock;
        m_commodities.push_back(c);
        cout << "添加成功！" << endl;
    }

    // 查询商品
    void queryCommodity() {
        string name;
        cout << "请输入要查询的商品名称：";
        cin >> name;
        for (int i = 0; i < m_commodities.size(); i++) {
            if (m_commodities[i].name == name) {
                cout << setw(10) << "名称"
                     << setw(10) << "价格"
                     << setw(10) << "库存" << endl;
                cout << setw(10) << m_commodities[i].name
                     << setw(10) << m_commodities[i].price
                     << setw(10) << m_commodities[i].stock << endl;
                return;
            }
        }
        cout << "未找到该商品！" << endl;
    }

    // 修改商品
    void modifyCommodity() {
        string name;
        cout << "请输入要修改的商品名称：";
        cin >> name;
        for (int i = 0; i < m_commodities.size(); i++) {
            if (m_commodities[i].name == name) {
                cout << "请输入新的商品价格：";
                cin >> m_commodities[i].price;
                cout << "请输入新的商品库存：";
                cin >> m_commodities[i].stock;
                cout << "修改成功！" << endl;
                return;
            }
        }
        cout << "未找到该商品！" << endl;
    }

    // 删除商品
    void deleteCommodity() {
        string name;
        cout << "请输入要删除的商品名称：";
        cin >> name;
        for (int i = 0; i < m_commodities.size(); i++) {
            if (m_commodities[i].name == name) {
                m_commodities.erase(m_commodities.begin() + i);
                cout << "删除成功！" << endl;
                return;
            }
        }
        cout << "未找到该商品！" << endl;
    }

    // 购物结算
    void settleAccounts() {
        vector<Commodity> shoppingList; // 购物清单
        double totalPrice = 0;          // 总价
        char choice = 'y';              // 是否继续添加商品
        while (choice == 'y' || choice == 'Y') {
            string name;
            cout << "请输入要购买的商品名称：";
            cin >> name;
            for (int i = 0; i < m_commodities.size(); i++) {
                if (m_commodities[i].name == name) {
                    shoppingList.push_back(m_commodities[i]);
                    totalPrice += m_commodities[i].price;
                    break;
                }
            }
            cout << "是否继续添加商品（y/n）：";
            cin >> choice;
        }
        // 输出购物清单
        cout << "购物清单：" << endl;
        cout << setw(10) << "名称"
             << setw(10) << "价格" << endl;
        for (int i = 0; i < shoppingList.size(); i++) {
            cout << setw(10) << shoppingList[i].name
                 << setw(10) << shoppingList[i].price << endl;
        }
        // 输出总价
        cout << "总价：" << totalPrice << endl;
    }

private:
    vector<Commodity> m_commodities; // 商品列表
};

int main() {
    Supermarket market;

    while (true) {
        cout << "请选择功能：" << endl;
        cout << "1.添加商品" << endl;
        cout << "2.查询商品" << endl;
        cout << "3.修改商品" << endl;
        cout << "4.删除商品" << endl;
        cout << "5.购物结算" << endl;
        cout << "6.退出系统" << endl;
        int choice;
        cin >> choice;
        switch (choice) {
            case 1:
                market.addCommodity();
                break;
            case 2:
                market.queryCommodity();
                break;
            case 3:
                market.modifyCommodity();
                break;
            case 4:
                market.deleteCommodity();
                break;
            case 5:
                market.settleAccounts();
                break;
            case 6:
                cout << "谢谢使用，再见！" << endl;
                return 0;
            default:
                cout << "输入有误，请重新输入！" << endl;
                break;
        }
    }

    return 0;
}