C++ 多态案例

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

//多态案例  电脑组装

//抽象不同零件类
//抽象CPU类
class CPU
{
public:
    //抽象的计算函数
    virtual void calculate() = 0;
};

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


//抽象内存条类
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_cpu;
            m_cpu = NULL;
        }

        //释放内存条零件
        if (m_vc != 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
//Inter厂商
class InterlCPU : public CPU
{
public:
    virtual void calculate()
    {
        cout << "Inter的CPU开始计算了！" << endl;
    }
};

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

class InterlMemory : public Memory
{
public:
    virtual void storage()
    {
        cout << "Inter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 InterlCPU;
    VideoCard * interlCard = new InterlVideoCard;
    Memory * interlMem = new InterlMemory;

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

    cout << "--------------------------------------" << endl;
    cout << "第二台电脑开始工作：" << endl;
    //第二台电脑组装
    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
    Computer* computer3 = new Computer(new LenovoCPU, new InterlVideoCard , new LenovoMemory);
    computer3->work();
    delete computer3;

}

int main()
{
    test01();
    //test02();
    
    system("pause");
    return 0;

}