外观模式-c++

#include <iostream>
//子系统：内存
class Memory
{
public:
    Memory() {}
    void selfCheck() {
        printf("内存自检\n");
    }
};

//子系统：CPU
class CPU
{
public:
    CPU() {}
    void run() {
        printf("运行CPU运行\n");
    }
};

//子系统：硬盘
class HardDisk
{
public:
    HardDisk() {}
    void read() {
        printf("读取硬盘\n");
    }
};

//子系统：操作系统
class OS
{
public:
    OS() {}
    void load() {
        printf("载入操作系统\n");
    }
};
//外观类
class Facade
{
public:
    Facade() {
        memory = new Memory();
        cpu = new CPU();
        hardDisk = new HardDisk();
        os = new OS();
    }
    void powerOn() {
        printf("正在开机\n");
        memory->selfCheck();
        cpu->run();
        hardDisk->read();
        os->load();
        printf("开机完成！\n");
    }
private:
    Memory *memory;
    CPU *cpu;
    HardDisk *hardDisk;
    OS *os;
};

int main()
{
    Facade *facade = new Facade();
    facade->powerOn();

    printf("\n\n");

    system("pause");
    return 0;
}