用C++编写餐饮商家信息管理代码，包括餐厅编号、餐厅名称、开业时间、包间种类（10人以下就餐、10-20人就餐、30人以上就餐）及包间数量、详细地址、交通情况、餐饮种类（湘菜、川菜、鲁菜、烧烤等）、营业时间、有无演艺表演、平均消费价位、餐厅法人、餐厅法人身份证号、备注

以下是一个简单的餐饮商家信息管理代码，使用C++语言编写：

#include <iostream>
#include <string>
using namespace std;

class Restaurant {
private:
    int id;
    string name;
    string openTime;
    int smallRoomNum;
    int mediumRoomNum;
    int largeRoomNum;
    string address;
    string transportation;
    string cuisineType;
    string businessHours;
    bool hasPerformance;
    double averagePrice;
    string legalPerson;
    string idCard;
    string note;

public:
    Restaurant(int id, string name, string openTime, int smallRoomNum, int mediumRoomNum, int largeRoomNum,
               string address, string transportation, string cuisineType, string businessHours,
               bool hasPerformance, double averagePrice, string legalPerson, string idCard, string note) {
        this->id = id;
        this->name = name;
        this->openTime = openTime;
        this->smallRoomNum = smallRoomNum;
        this->mediumRoomNum = mediumRoomNum;
        this->largeRoomNum = largeRoomNum;
        this->address = address;
        this->transportation = transportation;
        this->cuisineType = cuisineType;
        this->businessHours = businessHours;
        this->hasPerformance = hasPerformance;
        this->averagePrice = averagePrice;
        this->legalPerson = legalPerson;
        this->idCard = idCard;
        this->note = note;
    }

    void displayInfo() {
        cout << "餐厅编号：" << id << endl;
        cout << "餐厅名称：" << name << endl;
        cout << "开业时间：" << openTime << endl;
        cout << "包间种类：" << endl;
        cout << "10人以下就餐：" << smallRoomNum << " 个" << endl;
        cout << "10-20人就餐：" << mediumRoomNum << " 个" << endl;
        cout << "30人以上就餐：" << largeRoomNum << " 个" << endl;
        cout << "详细地址：" << address << endl;
        cout << "交通情况：" << transportation << endl;
        cout << "餐饮种类：" << cuisineType << endl;
        cout << "营业时间：" << businessHours << endl;
        cout << "有无演艺表演：" << (hasPerformance ? "是" : "否") << endl;
        cout << "平均消费价位：" << averagePrice << " 元/人" << endl;
        cout << "餐厅法人：" << legalPerson << endl;
        cout << "餐厅法人身份证号：" << idCard << endl;
        cout << "备注：" << note << endl;
    }
};

int main() {
    Restaurant res(1, "XXX餐厅", "2021年5月1日", 3, 2, 1, "广州市天河区XXX路XXX号", "地铁2号线XXX站A出口", "湘菜、川菜、粤菜", "周一至周日 10:00-22:00",
                   true, 50.0, "张三", "440123********1234", "欢迎光临！");
    res.displayInfo();

    return 0;
}

该代码通过定义餐厅类Restaurant，包含了所需的所有属性，并提供了显示餐厅信息的函数displayInfo。在主函数中创建一个餐厅对象并调用displayInfo函数进行信息展示。可以根据需要扩展该类的功能实现更复杂的餐饮商家信息管理系统。