c++学习记录多态—案例2

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;
}