Decorator-Pattern Head first

Decorator-Pattern/Beverage.hpp

+#ifndef BEVERAGE_HPP
+#define BEVERAGE_HPP
+
+#include <string>
+
+class Beverage {
+public:
+    virtual std::string getDescription() {
+        return "Unkown Beverage";
+    }
+
+    virtual double cost() = 0;
+    virtual ~Beverage() = default;
+};
+
+
+#endif
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Decorator-Pattern/CondimentDecorator.hpp

+#ifndef CONDIMENTDECORATOR_HPP
+#define CONDIMENTDECORATOR_HPP
+
+#include "Beverage.hpp"
+
+#include <memory>
+
+class CondimentDecorator : public Beverage {
+protected:
+    std::unique_ptr<Beverage> beverage;
+public:
+    CondimentDecorator(std::unique_ptr<Beverage> b) : beverage(std::move(b)) {}
+    virtual ~CondimentDecorator() = default;
+};
+
+#endif

Decorator-Pattern/Espresso.hpp

+#ifndef ESPRESSO_HPP
+#define ESPRESSO_HPP
+
+#include "Beverage.hpp"
+
+class Espresso : public Beverage {
+public:
+    std::string getDescription() {
+        return "Espresso";
+    }
+
+    double cost() {
+        return 1.99;
+    }
+};
+
+#endif
\ No newline at end of file

Decorator-Pattern/HouseBlend.hpp

+#ifndef HOUSEBLEND_HPP
+#define HOUSEBLEND_HPP
+
+#include "Beverage.hpp"
+
+class HouseBlend : public Beverage {
+public:
+    std::string getDescription() {
+        return "House Blend Coffee";
+    }
+
+    double cost() {
+        return .89;
+    }
+};
+
+#endif
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Decorator-Pattern/Makefile

+all:
+	g++ -g -Wall -o main main.cpp
+
+rm:
+	main
\ No newline at end of file

Decorator-Pattern/Mocha.hpp

+#ifndef MOCHA_HPP
+#define MOCHA_HPP
+
+#include "CondimentDecorator.hpp"
+
+class Mocha : public CondimentDecorator {
+public:
+    Mocha(std::unique_ptr<Beverage> b) : CondimentDecorator(std::move(b)) {}
+
+    std::string getDescription() {
+        return beverage->getDescription() + ", Mocha";
+    }
+
+    double cost() {
+        return .20 + beverage->cost();
+    }
+};
+
+#endif
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Decorator-Pattern/README.md

+## 装饰者模式
+
+![](https://img-blog.csdnimg.cn/20190610235715849.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlc3Ricm9va2xpdQ==,size_16,color_FFFFFF,t_70)

Decorator-Pattern/main.cpp

+#include "Espresso.hpp"
+#include "Mocha.hpp"
+#include "HouseBlend.hpp"
+
+#include <iostream>
+
+int main() {
+    std::unique_ptr<Beverage> b2 = std::make_unique<Espresso>(); 
+    b2 = std::make_unique<Mocha>(std::move(b2));
+    std::cout << b2->getDescription() << " $" << b2->cost() << std::endl;
+
+    std::unique_ptr<Beverage> b3 = std::make_unique<HouseBlend>(); 
+    b3 = std::make_unique<Mocha>(std::move(b3));
+    std::cout << b3->getDescription() << " $" << b3->cost() << std::endl;
+}
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README.md

@@ -47,6 +47,7 @@
 + [Strategy(Head-First版)](https://github.com/liu-jianhao/Cpp-Design-Patterns/tree/master/Strategy-Pattern)
 ### 单一职责：
 + [Decorator](https://github.com/liu-jianhao/Cpp-Design-Patterns/tree/master/Decorator)
++ [Decorator(Head-First版)](https://github.com/liu-jianhao/Cpp-Design-Patterns/tree/master/Decorator-Pattern)
 + [Bridge](https://github.com/liu-jianhao/Cpp-Design-Patterns/tree/master/Bridge)
 ### 对象创建:
 + [Factory Method](https://github.com/liu-jianhao/Cpp-Design-Patterns/tree/master/Factory%20Method)