多态案例–组装三台电脑

电脑零件基类CPU，显卡，内存条
不同的厂商，如Intel，Lenovo等；
- 三个零件基类，CPU，Videocard，Memory；不同厂商生产的零件来实现具体的功能。

#include <iostream>
using namespace std;
//公共零件基类
class CPU
{
public:
	virtual void calculate() = 0;
};
class Videocare
{
public:
	virtual void display() = 0;
};
class Memory
{
public:
	virtual void storage() = 0;
};
//Intel生产的零件
class IntelCPU : public CPU
{
public:
	virtual void calculate()
	{
		cout << "IntelCPU is calculating\n";
	}
};
class IntelVideocard : public Videocare
{
public:
	virtual void display()
	{
		cout << "Intel Videocard is displaying\n";
	}
};
class IntelMemory : public Memory
{
public:
	virtual void storage()
	{
		cout << "Intel Memory is storaging\n";
	}
};
//Lenovo生产的零件
class LenovoCPU : public CPU
{
public:
	virtual void calculate()
	{
		cout << "LenovoCPU is calculating\n";
	}
};
class LenovoVideocard : public Videocare
{
public:
	virtual void display()
	{
		cout << "Lenovo Videocard is displaying\n";
	}
};
class LenovoMemory : public Memory
{
public:
	virtual void storage()
	{
		cout << "Lenovo Memory is storaging\n";
	}
};
//电脑组装
class Computer
{
private:
	CPU* cpu;
	Videocare* vc;
	Memory* memory;
public:
	Computer(CPU* cpu, Videocare* vc, Memory* memory)
	{
		this->cpu = cpu;
		this->vc = vc;
		this->memory = memory;
	}
	~Computer()
	{
		if (cpu != NULL)
		{
			delete cpu;
			cpu = NULL;
		}
		if (cpu != NULL)
		{
			delete cpu;
			cpu = NULL;
		}
		if (cpu != NULL)
		{
			delete cpu;
			cpu = NULL;
		}
	}
	void work()
	{
		cpu->calculate();
		vc->display();
		memory->storage();
	}
};
//组装测试
	//测试Intel零件
void test1()
{
	CPU* intelCpu = new IntelCPU;
	Videocare* intelVc = new IntelVideocard;
	Memory* memory = new IntelMemory;
	Computer computer(intelCpu, intelVc, memory);
	computer.work();
}
	//测试Lenovo零件
void test2()
{
	Computer computer(new LenovoCPU, new LenovoVideocard, new LenovoMemory);
	computer.work();
}
void test3()
{
	Computer computer(new IntelCPU, new IntelVideocard, new LenovoMemory);
	computer.work();
}
int main()
{
	cout << "------------测试1开始-----------\n";
	test1();
	cout << "------------测试2开始-----------\n";
	test2();
	cout << "------------测试3开始-----------\n";
	test3();
	return 0;
}