c++学习记录 多态—案例2—电脑组装

#include<iostream>
using namespace std;

//抽象不同的零件

//抽象的cpu类
class Cpu
{
public:
	//抽象的计算函数
	virtual void calculate() = 0;
};

//抽象的显卡类
class VideoCard
{
public:
	//抽象的显示函数
	virtual void display() = 0;
};

//抽象的内存条类
class Memory
{
public:
	//抽象的存储函数
	virtual void storage() = 0;
};

//电脑类
class Computer
{
public:
	Computer(Cpu* cpu, VideoCard* vc, Memory* mem)
	{
		m_cpu = cpu;
		m_vc = vc;
		m_mem = mem;
	}

	//提供工作的函数
	void work()
	{
		//让零件工作起来，调用具体的接口
		m_cpu->calculate();
		m_vc->display();
		m_mem->storage();
	}

	//提供析构函数 释放3个电脑零件
	~Computer()
	{
		//释放CPU零件
		if (m_cpu != NULL)
		{
			delete m_cpu;
			m_cpu = NULL;
		}

		//释放显卡零件
		if (m_vc != NULL)
		{
			delete m_vc;
			m_vc = NULL;
		}

		//释放内存条零件
		if (m_mem != NULL)
		{
			delete m_mem;
			m_mem = NULL;
		}
	}

private:

	Cpu* m_cpu;//Cpu的零件指针
	VideoCard* m_vc;//显卡零件指针
	Memory* m_mem;//内存条零件指针
};

//具体厂商
//Intel厂商
class IntelCpu :public Cpu
{
public:
	virtual void calculate()
	{
		cout << "Intel的CPU开始计算了！" << endl;
	}
};

class IntelVideoCard :public VideoCard
{
public:
	virtual void display()
	{
		cout << "Intel的显卡开始显示了！" << endl;
	}
};

class IntelMemory :public Memory
{
public:
	virtual void storage()
	{
		cout << "Intel的内存条开始存储了！" << endl;
	}
};

//Lenovo厂商
class LenovoCpu :public Cpu
{
public:
	virtual void calculate()
	{
		cout << "Lenovo的CPU开始计算了！" << endl;
	}
};

class LenovoVideoCard :public VideoCard
{
public:
	virtual void display()
	{
		cout << "Lenovo的显卡开始显示了！" << endl;
	}
};

class LenovoMemory :public Memory
{
public:
	virtual void storage()
	{
		cout << "Lenovo的内存条开始存储了！" << endl;
	}
};

void test01()
{
	//第一台电脑零件
	Cpu* intelCpu = new IntelCpu;
	VideoCard* intelCard = new IntelVideoCard;
	Memory* intelMem = new IntelMemory;

	cout << "第一台电脑开始工作：" << endl;
	//创建第一台电脑
	Computer* computer1 = new Computer(intelCpu, intelCard, intelMem);
	computer1->work();
	delete computer1;

	cout << "------------------------" << endl;
	cout << "第二台电脑开始工作：" << endl;
	第二台电脑组装
	//Cpu* lenovoCpu = new LenovoCpu;
	//VideoCard* lenovoCard = new LenovoVideoCard;
	//Memory* lenovoMem = new LenovoMemory;

	//创建第二台电脑
	Computer* computer2 = new Computer(new LenovoCpu, new LenovoVideoCard, new LenovoMemory);
	computer2->work();
	delete computer2;

	cout << "------------------------" << endl;
	cout << "第三台电脑开始工作：" << endl;
	第三台电脑组装
	//Cpu* lenovoCpu = new LenovoCpu;
	//VideoCard* intelCard3 = new IntelVideoCard;
	//Memory* lenovoMem = new LenovoMemory;

	//创建第三台电脑
	Computer* computer3 = new Computer(new LenovoCpu, new IntelVideoCard, new LenovoMemory);
	computer3->work();
	delete computer3;
}

int main()
{
	test01();

	system("pause");
	return 0;
}