外观模式定义
为复杂系统提供一个简化接口,它通过创建一个高层接口(外观),将多个子系统的复杂操作封装起来,以便客户端更容易使用。
简单实现
cpp
#include<iostream>
// 子系统类
class SubsystemA {
public:
void operationA() {
std::cout << "Subsystem A operation" << std::endl;
}
};
class SubsystemB {
public:
void operationB() {
std::cout << "Subsystem B operation" << std::endl;
}
};
class SubsystemC {
public:
void operationC() {
std::cout << "Subsystem C operation" << std::endl;
}
};
// 外观类
class Facade {
public:
void operation() {
subsystemA.operationA();
subsystemB.operationB();
subsystemC.operationC();
}
private:
SubsystemA subsystemA;
SubsystemB subsystemB;
SubsystemC subsystemC;
};
int main() {
Facade facade;
facade.operation();
return 0;
}