案例描述:

1. 电脑主要组成部件为 CPU (用于计算) ，显卡 (用于显示) ，内存条 (用于存储)
2. 将每个零件封装出抽象基类，并且提供不同的厂商生产不同的零件，例如Intel厂商和Lenovo厂商
3. 创建电脑类提供让电脑工作的函数，并且调用每个警件工作的接口
4. 测试时组装三台不同的电脑进行工作

程序设计伪代码

测试代码

#include<iostream>
#include<string>
using namespace std;


//抽象不同的零件类
//抽象CPU类
class CPU 
{
public:
	virtual void calculate() = 0;	//计算
};

//抽象VideoCard类
class VideoCard 
{
public:	
	 virtual void display() = 0;//显示
};

//抽象Memory类
class Memory 
{
public:	
	virtual void storage() = 0;//存储
};



/****************************厂商一*****************/
///具体类继承抽象类
class IntelCPU:public CPU
{
public:
	//计算
	virtual void calculate()
	{
		cout << "Intel的CPU正式计算啦" << endl;	
	}
};


class IntelVideoCard:public VideoCard
{
public:
	//显示
	 void display()
	{
		cout << "Intel的VideoCard正式显示啦" << endl;
	}
};
class IntelMemory:public Memory
{
public:
	//存储
	virtual void storage()
	{
		cout << "Intel的Memory正式存储啦" << endl;
	}
};








/****************************厂商二*****************/
///具体类继承抽象类
class LenovoCPU :public CPU
{

public:
	//计算
	virtual void calculate()
	{
		cout << "Lenovo的CPU正式计算啦" << endl;

	}
};


class LenovoVideoCard :public VideoCard
{

public:
	//计算
	virtual void display()
	{
		cout << "Lenovo的CPU正式显示啦" << endl;

	}
};
class LenovoMemory :public Memory
{

public:
	//计算
	virtual void storage()
	{
		cout << "Lenovo的Memory正式存储啦" << endl;

	}
};



//  计算机类
class Computer {
public:
	//构造函数
	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()
	{
		m_cpu->calculate();
		m_vc->display();
		m_mem->storage();

		
	}

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

		if (m_mem != NULL)
		{
			delete m_mem;
			m_mem = NULL;
		}
	}




private:
	//三个私有成员变量
	CPU *m_cpu;
	VideoCard *m_vc;
	Memory *m_mem;
};


//组装电脑

void testComputer()
{


	//第一台电脑零件
	CPU *intelCpu = new IntelCPU;
	VideoCard *Intelcard = new IntelVideoCard;
	Memory *intelMem = new IntelMemory;


	

	//创建第一台电脑
	Computer *computerl = new Computer(intelCpu, Intelcard, intelMem);
	computerl->work();
	cout << "第1台电脑组装成功了" << endl;
	delete computerl;



	//创建第二台电脑
	Computer *computer2 = new Computer(new LenovoCPU, new LenovoVideoCard, new LenovoMemory);
	computer2->work();
	cout << "第2台电脑组装成功了" << endl;
	delete computer2;






}











int main()
{



	testComputer();



}

结果