C++实现桥接模式代码

桥接（Bridge）是一种结构型设计模式，用于分离抽象接口及其实现。在C++中，可以通过以下方式实现桥接模式：

#include <iostream>
 
// 抽象类接口
class AbstractionImp {
public:
    virtual void operation() = 0;
    virtual ~AbstractionImp() {}
};
 
// 实现类
class ConcreteImpA : public AbstractionImp {
public:
    void operation() override {
        std::cout << "ConcreteImpA operation." << std::endl;
    }
};
 
class ConcreteImpB : public AbstractionImp {
public:
    void operation() override {
        std::cout << "ConcreteImpB operation." << std::endl;
    }
};
 
// 抽象类
class Abstraction {
protected:
    AbstractionImp* imp;
public:
    Abstraction(AbstractionImp* imp) : imp(imp) {}
    virtual ~Abstraction() { delete imp; }
    virtual void operation() {
        imp->operation();
    }
};
 
// 扩展抽象类
class RefinedAbstraction : public Abstraction {
public:
    RefinedAbstraction(AbstractionImp* imp) : Abstraction(imp) {}
    void extraOperation() {
        // 可以添加额外的操作
        std::cout << "RefinedAbstraction operation." << std::endl;
    }
};
 
int main() {
    AbstractionImp* impA = new ConcreteImpA();
    AbstractionImp* impB = new ConcreteImpB();
 
    Abstraction* abstractionA = new RefinedAbstraction(impA);
    Abstraction* abstractionB = new RefinedAbstraction(impB);
 
    abstractionA->operation();
    abstractionB->operation();
 
    delete abstractionA;
    delete abstractionB;
 
    return 0;
}