多态案例三--电脑组装

案例描述：

过程分析：

示例：

#include<iostream>
#include<string>
using namespace std;
//CUP  抽象类 
class CPU
{
    public: 
    virtual void calculate()=0;
};
//显卡  抽象类 
class VideCard
{
    public:
    virtual void display()=0;
};
//内存条 抽象类 
class Memory
{
    public:
    virtual void storage()=0;
};
//电脑类 
class Computer
{
    public:
//    构造函数中传入三个零件指针
    Computer(CPU *cp,VideCard *vi,Memory *me)
    {
        m_cp=cp;
        m_vi=vi;
        m_me=me;
    }
    void show()
    {
        m_cp->calculate();
        m_vi->display();
        m_me->storage();
    }
    //提供工作的函数
    //{
    //    调用每个零件的接口 
    //}
    ~Computer()
    {
        //释放CUP 
        if(m_cp!=NULL)
        {
            delete m_cp;
            m_cp=NULL; 
        }
        if(m_vi!=NULL)
        {
            delete m_vi;
            m_vi=NULL; 
        }
        if(m_me!=NULL)
        {
            delete m_me;
            m_me=NULL; 
        }
    }
    private:
      CPU *m_cp;
      VideCard *m_vi;
      Memory *m_me;
}; 
//具体的零件厂商
//inter 厂商
class InterCPU:public CPU
{
    public:
        void calculate()
        {
            cout<<"Inter的CPU开始工作了"<<endl; 
        }
};
class InterVideCard:public VideCard
{
    public:
        void display()
        {
            cout<<"Inter的VideCard开始显示了"<<endl; 
        }
};
class InterMemory:public Memory
{
    public:
        void storage()
        {
            cout<<"Inter的Memory开始存储了"<<endl; 
        }
};
class LenovoCPU:public CPU
{
    public:
        void calculate()
        {
            cout<<"Lenovo的CPU开始工作了"<<endl; 
        }
};
class LenovoVideCard:public VideCard
{
    public:
        void display()
        {
            cout<<"Lenovo的VideCard开始显示了"<<endl; 
        }
};
class LenovoMemory:public Memory
{
    public:
        void storage()
        {
            cout<<"Lenovo的VideCard开始存储了"<<endl; 
        }
};
void test01()
{
    //第一台电脑的零件
    CPU *cp=new InterCPU;
    VideCard *vi =new InterVideCard;
    Memory *me=new InterMemory;
    //第一台电脑 
    Computer *com1=new Computer(cp,vi,me);
    com1->show();
    delete com1;
    cout<<"*********************"<<endl<<endl;
    //第二台电脑
    Computer *com2=new Computer(new LenovoCPU,new LenovoVideCard,new LenovoMemory);
    com2->show();
    delete com2; 
}
int main()
{
    test01();
    return 0;
}