8.9.6 装饰器模式
装饰器模式是一种结构型模式，主要是给一个类添加更多功能；
示例代码：
#include <iostream>
#include <string>// 抽象基类：文本修饰器
class TextDecorator {
public:virtual std::string decorate(const std::string& text) const = 0;
};// 具体修饰器：加粗修饰器
class BoldDecorator : public TextDecorator {
public:std::string decorate(const std::string& text) const override {return "<b>" + text + "</b>";}
};// 具体修饰器：斜体修饰器
class ItalicDecorator : public TextDecorator {
public:std::string decorate(const std::string& text) const override {return "<i>" + text + "</i>";}
};int main() {// 原始文本std::string text = "Hello, world!";// 创建修饰器对象TextDecorator* boldDecorator = new BoldDecorator();TextDecorator* italicDecorator = new ItalicDecorator();// 使用装饰器修饰文本std::string boldText = boldDecorator->decorate(text);std::string italicText = italicDecorator->decorate(text);// 显示修饰后的文本std::cout << "Bold Text: " << boldText << std::endl;std::cout << "Italic Text: " << italicText << std::endl;// 释放内存delete boldDecorator;delete italicDecorator;return 0;
}
