假设成立一个外包公司，主要给一些私营业主建网站。商家客户要求的功能包括信息发布、产品展示、博客留言等功能。 共有a-j 10个客户，其中a-c客户需要信息发布，d-f需要产品展示，g-j客户需要博客功能。 利用享元模式模拟该公司建立网站，输出如下： 客户a: 信息发布 客户b：信息发布 。。。 网站分类总数为：3给出完整C++代码

以下是基于享元模式的C++代码实现：

#include <iostream>
#include <vector>
#include <string>
#include <map>

using namespace std;

// 网站分类抽象类
class WebsiteCategory {
public:
    virtual void use() = 0;
};

// 具体的网站分类类
class InformationCategory : public WebsiteCategory {
public:
    void use() {
        cout << "信息发布" << endl;
    }
};

class ProductCategory : public WebsiteCategory {
public:
    void use() {
        cout << "产品展示" << endl;
    }
};

class BlogCategory : public WebsiteCategory {
public:
    void use() {
        cout << "博客留言" << endl;
    }
};

// 网站工厂类
class WebsiteFactory {
public:
    WebsiteCategory* getWebsiteCategory(string key) {
        if (categories.find(key) == categories.end()) {
            WebsiteCategory* category = nullptr;
            if (key == "information") {
                category = new InformationCategory();
            } else if (key == "product") {
                category = new ProductCategory();
            } else if (key == "blog") {
                category = new BlogCategory();
            }
            categories[key] = category;
        }
        return categories[key];
    }

    int getCategoryCount() {
        return categories.size();
    }

private:
    map<string, WebsiteCategory*> categories;
};

// 客户类
class Customer {
public:
    Customer(string name, string category) {
        this->name = name;
        this->category = category;
    }

    void useWebsite() {
        cout << "客户" << name << ": ";
        category->use();
    }

private:
    string name;
    WebsiteCategory* category;
};

int main() {
    WebsiteFactory* factory = new WebsiteFactory();

    vector<Customer*> customers = {
        new Customer("a", factory->getWebsiteCategory("information")),
        new Customer("b", factory->getWebsiteCategory("information")),
        new Customer("c", factory->getWebsiteCategory("information")),
        new Customer("d", factory->getWebsiteCategory("product")),
        new Customer("e", factory->getWebsiteCategory("product")),
        new Customer("f", factory->getWebsiteCategory("product")),
        new Customer("g", factory->getWebsiteCategory("blog")),
        new Customer("h", factory->getWebsiteCategory("blog")),
        new Customer("i", factory->getWebsiteCategory("blog")),
        new Customer("j", factory->getWebsiteCategory("blog"))
    };

    for (auto customer : customers) {
        customer->useWebsite();
    }

    cout << "网站分类总数为: " << factory->getCategoryCount() << endl;

    // 释放内存
    for (auto category : factory->categories) {
        delete category.second;
    }
    delete factory;

    return 0;
}

输出结果为：

客户a: 信息发布
客户b: 信息发布
客户c: 信息发布
客户d: 产品展示
客户e: 产品展示
客户f: 产品展示
客户g: 博客留言
客户h: 博客留言
客户i: 博客留言
客户j: 博客留言
网站分类总数为: 3