多态案例三电脑组装

//多态案例三  --调用组装
//CPU---计算   显卡---显示   内存条--储存
class CPU
{
    
public:
	//计算
	virtual void Calculator() = 0;
};

class Graphics
{
    
public:
	virtual void Display() = 0;
};

class MemoryModule
{
    
public:
	virtual void Store() = 0;
};

//创建一个电脑类
class Computer
{
    
public:
	//构造函数
	Computer(CPU* cpu, Graphics* gra, MemoryModule* mem)
	{
    
		m_cpu = cpu;
		m_gra = gra;
		m_mem = mem;
	}

	//电脑工作
	void Work()
	{
    
		m_cpu->Calculator();
		m_gra->Display();
		m_mem->Store();
	}

	//释放工作零件
	~Computer()
	{
    
		if (m_cpu != NULL)
		{
    
			delete m_cpu;
			m_cpu = NULL;
		}
		else if(m_gra != NULL)
		{
    
			delete m_gra;
			m_gra = NULL;
		}
		else if(m_mem != NULL)
		{
    
			delete m_mem;
			m_mem= NULL;
		}
	}

private:
	//调用包含了CPU Graphics MemoryModule
	CPU* m_cpu;
	Graphics* m_gra;
	MemoryModule* m_mem;
};

//具体厂商
class intermanCPU:public CPU
{
    
public:
	virtual void Calculator()
	{
    
		cout << "inter的CPU在运转了" << endl;
	}

};

class intermanGRA :public Graphics
{
    
public:
	virtual void Display()
	{
    
		cout << "inter的显卡在运转了" << endl;
	}

};
class intermanMem :public MemoryModule
{
    
public:
	virtual void Store()
	{
    
		cout << "inter的内存条在运转了" << endl;
	}

};

int main()
{
    
	//实例化电脑的类对象
	//先把零件类对象实例化
	CPU* interCPU = new intermanCPU;//cpu
	Graphics* interGra = new intermanGRA;//显卡
	MemoryModule* interMem = new intermanMem;//内存条

	//将零件全部组装到电脑上
	//组装一台因特尔的电脑
	Computer* interComputer = new Computer(interCPU, interGra, interMem);
	interComputer->Work();
	delete interComputer;//释放堆上创建的内存空间

}

运用知识点： 纯虚函数，继承，堆空间创建、删除

如有错误，多多指教！