c++设计一个超市管理系统代码

以下是一个简单的超市管理系统的C++代码，实现了基本的商品管理和销售功能。

#include <iostream>
#include <string>
#include <vector>
#include <iomanip>

using namespace std;

// 商品结构体
struct Commodity {
    string name;    // 商品名称
    double price;   // 商品单价
    int inventory;  // 商品库存

    // 构造函数
    Commodity(string n, double p, int i) : name(n), price(p), inventory(i) {}
};

// 超市类
class Supermarket {
private:
    vector<Commodity> commodities;  // 商品列表

public:
    // 添加商品
    void addCommodity(string name, double price, int inventory) {
        commodities.emplace_back(name, price, inventory);
        cout << "商品添加成功！" << endl;
    }

    // 显示商品列表
    void showCommodityList() {
        cout << left << setw(10) << "编号"
             << left << setw(20) << "商品名称"
             << left << setw(10) << "单价"
             << left << setw(10) << "库存" << endl;
        for (int i = 0; i < commodities.size(); i++) {
            cout << left << setw(10) << i + 1
                 << left << setw(20) << commodities[i].name
                 << left << setw(10) << commodities[i].price
                 << left << setw(10) << commodities[i].inventory << endl;
        }
    }

    // 销售商品
    void sellCommodity(int index, int quantity) {
        if (index < 1 || index > commodities.size()) {
            cout << "商品不存在！" << endl;
            return;
        }
        Commodity& commodity = commodities[index - 1];
        if (commodity.inventory < quantity) {
            cout << "库存不足！" << endl;
            return;
        }
        commodity.inventory -= quantity;
        double totalPrice = commodity.price * quantity;
        cout << "商品销售成功！总价：" << totalPrice << endl;
    }
};

int main() {
    Supermarket market;
    int choice;
    while (true) {
        cout << "超市管理系统" << endl;
        cout << "1. 添加商品" << endl;
        cout << "2. 显示商品列表" << endl;
        cout << "3. 销售商品" << endl;
        cout << "4. 退出" << endl;
        cout << "请选择操作：";
        cin >> choice;
        switch (choice) {
            case 1: {
                string name;
                double price;
                int inventory;
                cout << "请输入商品名称：";
                cin >> name;
                cout << "请输入商品单价：";
                cin >> price;
                cout << "请输入商品库存：";
                cin >> inventory;
                market.addCommodity(name, price, inventory);
                break;
            }
            case 2: {
                market.showCommodityList();
                break;
            }
            case 3: {
                int index;
                int quantity;
                cout << "请输入要销售的商品编号：";
                cin >> index;
                cout << "请输入销售数量：";
                cin >> quantity;
                market.sellCommodity(index, quantity);
                break;
            }
            case 4: {
                return 0;
            }
            default: {
                cout << "无效操作！" << endl;
            }
        }
    }
}

该代码使用了结构体存储商品信息，使用vector容器存储商品列表，实现了商品添加、显示商品列表和销售商品等基本功能。