用C++代码写一个中介有若干房源，信息包括房屋编号、房屋地址、业主名称、联系方式、月租金；租赁信息包括房屋编号、承租人、承租开始时间、结束时间；请设计相关类和程序实现房源信息的添加、修改和查询功能以及房屋租赁的管理。

以下是用 C++ 语言实现的简单代码，实现了房源信息的添加、修改和查询功能以及房屋租赁的管理。具体实现方式可能不完善，仅供参考。

#include<iostream>
#include<string>

using namespace std;

class House {
public:
    int id;  // 房屋编号
    string address;  // 房屋地址
    string owner;  // 业主名称
    string phone;  // 联系方式
    double rent;  // 月租金

    void display() {
        cout << "房屋编号：" << id << endl;
        cout << "房屋地址：" << address << endl;
        cout << "业主名称：" << owner << endl;
        cout << "联系方式：" << phone << endl;
        cout << "月租金：" << rent << endl;
    }
};

class Lease {
public:
    int id;  // 房屋编号
    string tenant;  // 承租人
    string start_date;  // 承租开始时间
    string end_date;  // 承租结束时间

    void display() {
        cout << "房屋编号：" << id << endl;
        cout << "承租人：" << tenant << endl;
        cout << "承租开始时间：" << start_date << endl;
        cout << "承租结束时间：" << end_date << endl;
    }
};

class Agency {
public:
    House houses[100];  // 房源数组
    Lease leases[100];  // 租赁信息数组
    int house_count = 0;  // 房源总数
    int lease_count = 0;  // 租赁信息总数

    // 添加房源信息
    void add_house() {
        House new_house;
        cout << "请输入房屋编号：";
        cin >> new_house.id;
        cout << "请输入房屋地址：";
        cin >> new_house.address;
        cout << "请输入业主名称：";
        cin >> new_house.owner;
        cout << "请输入联系方式：";
        cin >> new_house.phone;
        cout << "请输入月租金：";
        cin >> new_house.rent;

        houses[house_count] = new_house;
        house_count++;
    }

    // 修改房源信息
    void modify_house() {
        int id;
        cout << "请输入要修改的房屋编号：";
        cin >> id;

        for (int i = 0; i < house_count; i++) {
            if (houses[i].id == id) {
                cout << "请输入新的房屋地址：";
                cin >> houses[i].address;
                cout << "请输入新的业主名称：";
                cin >> houses[i].owner;
                cout << "请输入新的联系方式：";
                cin >> houses[i].phone;
                cout << "请输入新的月租金：";
                cin >> houses[i].rent;
                cout << "房源信息已修改！" << endl;
                return;
            }
        }

        cout << "未找到该房屋编号的房源！" << endl;
    }

    // 查询房源信息
    void search_house() {
        int id;
        cout << "请输入要查询的房屋编号：";
        cin >> id;

        for (int i = 0; i < house_count; i++) {
            if (houses[i].id == id) {
                houses[i].display();
                return;
            }
        }

        cout << "未找到该房屋编号的房源！" << endl;
    }

    // 添加租赁信息
    void add_lease() {
        Lease new_lease;
        cout << "请输入房屋编号：";
        cin >> new_lease.id;
        cout << "请输入承租人：";
        cin >> new_lease.tenant;
        cout << "请输入承租开始时间：";
        cin >> new_lease.start_date;
        cout << "请输入承租结束时间：";
        cin >> new_lease.end_date;

        leases[lease_count] = new_lease;
        lease_count++;
    }

    // 修改租赁信息
    void modify_lease() {
        int id;
        cout << "请输入要修改的房屋编号：";
        cin >> id;

        for (int i = 0; i < lease_count; i++) {
            if (leases[i].id == id) {
                cout << "请输入新的承租人：";
                cin >> leases[i].tenant;
                cout << "请输入新的承租开始时间：";
                cin >> leases[i].start_date;
                cout << "请输入新的承租结束时间：";
                cin >> leases[i].end_date;
                cout << "租赁信息已修改！" << endl;
                return;
            }
        }

        cout << "未找到该房屋编号的租赁信息！" << endl;
    }

    // 查询租赁信息
    void search_lease() {
        int id;
        cout << "请输入要查询的房屋编号：";
        cin >> id;

        for (int i = 0; i < lease_count; i++) {
            if (leases[i].id == id) {
                leases[i].display();
                return;
            }
        }

        cout << "未找到该房屋编号的租赁信息！" << endl;
    }
};

int main() {
    Agency agency;
    int choice;

    do {
        cout << "请选择操作：" << endl;
        cout << "1.添加房源信息" << endl;
        cout << "2.修改房源信息" << endl;
        cout << "3.查询房源信息" << endl;
        cout << "4.添加租赁信息" << endl;
        cout << "5.修改租赁信息" << endl;
        cout << "6.查询租赁信息" << endl;
        cout << "0.退出程序" << endl;
        cout << "输入操作编号：";
        cin >> choice;

        switch (choice) {
        case 1:
            agency.add_house();
            break;
        case 2:
            agency.modify_house();
            break;
        case 3:
            agency.search_house();
            break;
        case 4:
            agency.add_lease();
            break;
        case 5:
            agency.modify_lease();
            break;
        case 6:
            agency.search_lease();
            break;
        case 0:
            return 0;
        default:
            cout << "操作编号错误，请重新输入！" << endl;
            break;
        }
    } while (true);

    return 0;
}